{"id":"CVE-2026-68579","aliases":["DEBIAN-CVE-2026-68579","EUVD-2026-51989","GHSA-m37j-jcr2-8gcc","GHSA-m4j8-6wj9-56fg","UBUNTU-CVE-2026-68579"],"status":"published","title":"FreeRDP before 3.30.0 Heap Overflow via CliprdrStream_Read","description":"FreeRDP before 3.30.0 (\u003c= 3.29.0) contains a heap-based buffer overflow in the Windows clipboard client's CliprdrStream_Read function (client/Windows/wf_cliprdr.c). When an OLE paste consumer (e.g. explorer.exe) calls IStream::Read with a fixed-size buffer of cb bytes, CliprdrStream_Read requests file contents from the RDP server and then copies the response into the caller's buffer using the server-supplied length (req_fsize) instead of cb. A malicious or compromised RDP server can return an oversized CB_FILECONTENTS_RESPONSE, causing an out-of-bounds write of attacker-controlled data into the paste consumer's heap buffer when a user pastes server-offered clipboard file contents.","severity":{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00479,"percentile":0.41677,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20","CWE-787"],"published":"2026-08-02T12:15:26Z","modified":"2026-10-28T02:31:03Z","fixes":[{"ecosystem":"Debian:14","package":"freerdp3","fixed_in":["3.30.0+dfsg-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:24.04:LTS","package":"freerdp3","fixed_in":["3.30.0+dfsg-0ubuntu0.24.04.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:26.04:LTS","package":"freerdp3","fixed_in":["3.30.0+dfsg-0ubuntu0.26.04.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"freerdp2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.10.0+dfsg1-1","2.10.0+dfsg1-1.1","2.11.2+dfsg1-1","2.11.2+dfsg1-1.1~exp1","2.11.2+dfsg1-1.1~exp2","2.11.5+dfsg1-1","2.11.7+dfsg1-1","2.11.7+dfsg1-2","2.11.7+dfsg1-3","2.11.7+dfsg1-4","2.11.7+dfsg1-5","2.11.7+dfsg1-6","2.11.7+dfsg1-6~deb12u1"]},{"source":"osv","ecosystem":"Debian:13","package":"freerdp3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.15.0+dfsg-2.1","3.15.0+dfsg-2.1+deb13u1","3.15.0+dfsg-2.1+deb13u2","3.15.0+dfsg-2.1+deb13u3","3.16.0+dfsg-1","3.16.0+dfsg-2","3.17.0+dfsg-1","3.17.1+dfsg-1","3.17.1+dfsg-2","3.17.2+dfsg-1","3.17.2+dfsg-2","3.17.2+dfsg-3","3.18.0+dfsg-1","3.19.0+dfsg-1","3.19.1+dfsg-1","3.20.0+dfsg-1","3.20.2+dfsg-1","3.21.0+dfsg-1","3.22.0+dfsg-1","3.22.0+dfsg-1~bpo13+0","3.22.0+dfsg-1~bpo13+1","3.22.0+dfsg-3","3.23.0+dfsg-1","3.23.0+dfsg-1~bpo13+1","3.24.0+dfsg-1","3.24.0+dfsg-2","3.24.1+dfsg-1","3.24.2+dfsg-1","3.24.2+dfsg-1~bpo13+1","3.25.0+dfsg-1","3.25.0+dfsg-2","3.25.0+dfsg-3","3.25.0+dfsg-4","3.25.0+dfsg-5","3.26.0+dfsg-1","3.26.0+dfsg-1~bpo13+1","3.27.0+dfsg-1","3.27.1+dfsg-1","3.28.0+dfsg-1","3.28.0+dfsg-2","3.29.0+dfsg-1","3.30.0+dfsg-1","3.30.0+dfsg-1~bpo13+1","3.31.0+dfsg-1","3.31.1+dfsg-1","3.31.1+dfsg-1~bpo13+1","3.32.0+dfsg-1","3.32.1+dfsg-1","3.32.1+dfsg-1~bpo13+1"]},{"source":"osv","ecosystem":"Debian:14","package":"freerdp3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.30.0+dfsg-1"}]}],"versions":["3.15.0+dfsg-2.1","3.16.0+dfsg-1","3.16.0+dfsg-2","3.17.0+dfsg-1","3.17.1+dfsg-1","3.17.1+dfsg-2","3.17.2+dfsg-1","3.17.2+dfsg-2","3.17.2+dfsg-3","3.18.0+dfsg-1","3.19.0+dfsg-1","3.19.1+dfsg-1","3.20.0+dfsg-1","3.20.2+dfsg-1","3.21.0+dfsg-1","3.22.0+dfsg-1","3.22.0+dfsg-1~bpo13+0","3.22.0+dfsg-1~bpo13+1","3.22.0+dfsg-3","3.23.0+dfsg-1","3.23.0+dfsg-1~bpo13+1","3.24.0+dfsg-1","3.24.0+dfsg-2","3.24.1+dfsg-1","3.24.2+dfsg-1","3.24.2+dfsg-1~bpo13+1","3.25.0+dfsg-1","3.25.0+dfsg-2","3.25.0+dfsg-3","3.25.0+dfsg-4","3.25.0+dfsg-5","3.26.0+dfsg-1","3.26.0+dfsg-1~bpo13+1","3.27.0+dfsg-1","3.27.1+dfsg-1","3.28.0+dfsg-1","3.28.0+dfsg-2","3.29.0+dfsg-1","3.30.0+dfsg-1~bpo13+1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"freerdp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1","1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.2","1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.3","1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"freerdp2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.0~git20170725.1.1648deb+dfsg1-1","2.0.0~git20170725.1.1648deb+dfsg1-5","2.0.0~git20170725.1.1648deb+dfsg1-5ubuntu1","2.0.0~git20170725.1.1648deb+dfsg1-5ubuntu2","2.0.0~git20170725.1.1648deb+dfsg1-6","2.0.0~git20170725.1.1648deb+dfsg1-6build1","2.0.0~git20170725.1.1648deb+dfsg1-7","2.0.0~git20170725.1.1648deb+dfsg1-7ubuntu0.1","2.1.1+dfsg1-0ubuntu0.18.04.1","2.2.0+dfsg1-0ubuntu0.18.04.1","2.2.0+dfsg1-0ubuntu0.18.04.2","2.2.0+dfsg1-0ubuntu0.18.04.3","2.2.0+dfsg1-0ubuntu0.18.04.4","2.2.0+dfsg1-0ubuntu0.18.04.4+esm1","2.2.0+dfsg1-0ubuntu0.18.04.4+esm2","2.2.0+dfsg1-0ubuntu0.18.04.4+esm3","2.2.0+dfsg1-0ubuntu0.18.04.4+esm4","2.2.0+dfsg1-0ubuntu0.18.04.4+esm5","2.2.0+dfsg1-0ubuntu0.18.04.4+esm6"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"freerdp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1","1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.1","1.1.0~git20140921.1.440916e+dfsg1-15ubuntu1.18.04.2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"freerdp2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.0~git20190204.1.2693389a+dfsg1-1","2.0.0~git20190204.1.2693389a+dfsg1-2","2.0.0~git20190204.1.2693389a+dfsg1-2build1","2.0.0~git20190204.1.2693389a+dfsg1-2build2","2.1.1+dfsg1-0ubuntu0.20.04.1","2.2.0+dfsg1-0ubuntu0.20.04.1","2.2.0+dfsg1-0ubuntu0.20.04.2","2.2.0+dfsg1-0ubuntu0.20.04.3","2.2.0+dfsg1-0ubuntu0.20.04.4","2.2.0+dfsg1-0ubuntu0.20.04.5","2.2.0+dfsg1-0ubuntu0.20.04.6","2.6.1+dfsg1-0ubuntu0.20.04.1","2.6.1+dfsg1-0ubuntu0.20.04.2","2.6.1+dfsg1-0ubuntu0.20.04.2+esm1","2.6.1+dfsg1-0ubuntu0.20.04.2+esm2","2.6.1+dfsg1-0ubuntu0.20.04.2+esm3","2.6.1+dfsg1-0ubuntu0.20.04.2+esm4"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"freerdp2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.0+dfsg1-2build1","2.3.0+dfsg1-2ubuntu1","2.3.0+dfsg1-2ubuntu2","2.4.1+dfsg1-1","2.4.1+dfsg1-1ubuntu1","2.4.1+dfsg1-1ubuntu2","2.5.0+dfsg1-1","2.6.0+dfsg1-1","2.6.1+dfsg1-1","2.6.1+dfsg1-3","2.6.1+dfsg1-3ubuntu1","2.6.1+dfsg1-3ubuntu2","2.6.1+dfsg1-3ubuntu2.1","2.6.1+dfsg1-3ubuntu2.2","2.6.1+dfsg1-3ubuntu2.3","2.6.1+dfsg1-3ubuntu2.4","2.6.1+dfsg1-3ubuntu2.5","2.6.1+dfsg1-3ubuntu2.6","2.6.1+dfsg1-3ubuntu2.7","2.6.1+dfsg1-3ubuntu2.8","2.6.1+dfsg1-3ubuntu2.9","2.6.1+dfsg1-3ubuntu2.10","2.6.1+dfsg1-3ubuntu2.11"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"freerdp3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.30.0+dfsg-0ubuntu0.24.04.1"}]}],"versions":["3.4.0+dfsg1-0ubuntu2","3.4.0+dfsg1-0ubuntu3","3.4.0+dfsg1-0ubuntu4","3.5.0+dfsg1-0ubuntu1","3.5.1+dfsg1-0ubuntu1","3.5.1+dfsg1-0ubuntu1.1","3.5.1+dfsg1-0ubuntu1.2","3.5.1+dfsg1-0ubuntu1.4","3.5.1+dfsg1-0ubuntu1.5","3.5.1+dfsg1-0ubuntu1.6"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"freerdp2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.10.0+dfsg1-1.1ubuntu1","2.11.2+dfsg1-1","2.11.2+dfsg1-1build1","2.11.2+dfsg1-1build3","2.11.5+dfsg1-1build1","2.11.5+dfsg1-1build2","2.11.5+dfsg1-1ubuntu0.1~esm1","2.11.5+dfsg1-1ubuntu0.1~esm2","2.11.5+dfsg1-1ubuntu0.1~esm3","2.11.5+dfsg1-1ubuntu0.1~esm4","2.11.5+dfsg1-1ubuntu0.1~esm5","2.11.5+dfsg1-1ubuntu0.1~esm6"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"freerdp3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.30.0+dfsg-0ubuntu0.26.04.1"}]}],"versions":["3.16.0+dfsg-2","3.18.0+dfsg-1ubuntu1","3.19.0+dfsg-1","3.19.1+dfsg-1","3.20.0+dfsg-1","3.20.2+dfsg-1","3.21.0+dfsg-1","3.22.0+dfsg-1","3.24.1+dfsg-1ubuntu1","3.24.2+dfsg-1ubuntu1","3.24.2+dfsg-1ubuntu1.1"]}],"products":[{"vendor":"freerdp","product":"freerdp"}],"references":[{"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-m37j-jcr2-8gcc","tags":["vendor-advisory","Vendor Advisory","advisory","report"]},{"url":"https://github.com/FreeRDP/FreeRDP/commit/5e8e987b469b60a3bafadf8f5afc40f91c09f458","tags":["patch","Patch","fix","report"]},{"url":"https://www.vulncheck.com/advisories/freerdp-before-heap-overflow-via-cliprdrstream-read","tags":["third-party-advisory","Third Party Advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68579","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-m4j8-6wj9-56fg"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68579.json","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76840.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-76840","tags":["advisory"]},{"url":"https://www.vulncheck.com/advisories/rustdesk-through-heap-buffer-overflow-via-unvalidated-cliprdr-filecontentsresponse-length","tags":["advisory"]},{"url":"https://github.com/rustdesk/rustdesk/pull/15515","tags":["fix"]},{"url":"https://github.com/rustdesk/rustdesk","tags":["package"]},{"url":"https://github.com/rustdesk/rustdesk/blob/1.4.9/libs/clipboard/src/windows/wf_cliprdr.c","tags":["article"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-68579","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-68579","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-68579","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-68579","title":"FreeRDP before 3.30.0 Heap Overflow via CliprdrStream_Read","description":"FreeRDP before 3.30.0 (\u003c= 3.29.0) contains a heap-based buffer overflow in the Windows clipboard client's CliprdrStream_Read function (client/Windows/wf_cliprdr.c). When an OLE paste consumer (e.g. explorer.exe) calls IStream::Read with a fixed-size buffer of cb bytes, CliprdrStream_Read requests file contents from the RDP server and then copies the response into the caller's buffer using the server-supplied length (req_fsize) instead of cb. A malicious or compromised RDP server can return an oversized CB_FILECONTENTS_RESPONSE, causing an out-of-bounds write of attacker-controlled data into the paste consumer's heap buffer when a user pastes server-offered clipboard file contents.","status":"published","published":"2026-08-02T12:15:26.483Z","modified":"2026-08-03T15:37:29.358Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":9.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T13:45:59.110885Z"}],"euvd":[{"id":"EUVD-2026-51989","description":"FreeRDP before 3.30.0 (\u003c= 3.29.0) contains a heap-based buffer overflow in the Windows clipboard client's CliprdrStream_Read function (client/Windows/wf_cliprdr.c). When an OLE paste consumer (e.g. explorer.exe) calls IStream::Read with a fixed-size buffer of cb bytes, CliprdrStream_Read requests file contents from the RDP server and then copies the response into the caller's buffer using the server-supplied length (req_fsize) instead of cb. A malicious or compromised RDP server can return an oversized CB_FILECONTENTS_RESPONSE, causing an out-of-bounds write of attacker-controlled data into the paste consumer's heap buffer when a user pastes server-offered clipboard file contents.","status":"published","published":"2026-08-02T12:15:26Z","modified":"2026-08-03T15:37:29Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T18:02:24.366648Z"}],"ghsa":[{"id":"GHSA-m4j8-6wj9-56fg","title":"FreeRDP before 3.30.0 (\u003c= 3.29.0) contains a heap-based buffer overflow in the Windows clipboard...","description":"FreeRDP before 3.30.0 (\u003c= 3.29.0) contains a heap-based buffer overflow in the Windows clipboard client's CliprdrStream_Read function (client/Windows/wf_cliprdr.c). When an OLE paste consumer (e.g. explorer.exe) calls IStream::Read with a fixed-size buffer of cb bytes, CliprdrStream_Read requests file contents from the RDP server and then copies the response into the caller's buffer using the server-supplied length (req_fsize) instead of cb. A malicious or compromised RDP server can return an oversized CB_FILECONTENTS_RESPONSE, causing an out-of-bounds write of attacker-controlled data into the paste consumer's heap buffer when a user pastes server-offered clipboard file contents.","status":"published","published":"2026-08-02T15:30:21Z","modified":"2026-08-02T15:30:25Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"},{"version":"3.1","score":9.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:H","level":"critical"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T15:10:01.548476Z"}],"nvd":[{"id":"CVE-2026-68579","description":"FreeRDP before 3.30.0 (\u003c= 3.29.0) contains a heap-based buffer overflow in the Windows clipboard client's CliprdrStream_Read function (client/Windows/wf_cliprdr.c). When an OLE paste consumer (e.g. explorer.exe) calls IStream::Read with a fixed-size buffer of cb bytes, CliprdrStream_Read requests file contents from the RDP server and then copies the response into the caller's buffer using the server-supplied length (req_fsize) instead of cb. A malicious or compromised RDP server can return an oversized CB_FILECONTENTS_RESPONSE, causing an out-of-bounds write of attacker-controlled data into the paste consumer's heap buffer when a user pastes server-offered clipboard file contents.","status":"published","published":"2026-08-02T13:16:53.8Z","modified":"2026-09-29T16:17:08.47Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":9.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:12:34.290716Z"}],"osv":[{"id":"CVE-2026-68579","title":"FreeRDP before 3.30.0 Heap Overflow via CliprdrStream_Read","description":"FreeRDP before 3.30.0 (\u003c= 3.29.0) contains a heap-based buffer overflow in the Windows clipboard client's CliprdrStream_Read function (client/Windows/wf_cliprdr.c). When an OLE paste consumer (e.g. explorer.exe) calls IStream::Read with a fixed-size buffer of cb bytes, CliprdrStream_Read requests file contents from the RDP server and then copies the response into the caller's buffer using the server-supplied length (req_fsize) instead of cb. A malicious or compromised RDP server can return an oversized CB_FILECONTENTS_RESPONSE, causing an out-of-bounds write of attacker-controlled data into the paste consumer's heap buffer when a user pastes server-offered clipboard file contents.","status":"published","published":"2026-08-02T12:15:26.483Z","modified":"2026-10-28T02:30:23.900575018Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T15:45:14.808935Z"},{"id":"CVE-2026-76840","title":"RustDesk through 1.4.9 Heap Buffer Overflow via Unvalidated CLIPRDR FileContentsResponse Length","description":"RustDesk's Windows clipboard redirection copies a peer-supplied length into a fixed-size caller buffer without an upper bound check. When an OLE paste consumer such as explorer.exe calls IStream::Read with a buffer of cb bytes, CliprdrStream_Read in libs/clipboard/src/windows/wf_cliprdr.c requests that many bytes of a remote file through cliprdr_send_request_filecontents and then executes CopyMemory(pv, clipboard-\u003ereq_fdata, clipboard-\u003ereq_fsize), where req_fsize is taken verbatim from the peer's CLIPRDR FileContentsResponse by wf_cliprdr_server_file_contents_response (req_fsize = fileContentsResponse-\u003ecbRequested) and is never clamped to cb anywhere in the chain. The function's only length comparison, req_fsize \u003c cb, handles the short-read case and is evaluated after the copy has already occurred. A malicious or compromised peer that answers a small file-contents read with an oversized response therefore writes attacker-chosen data past the end of the paste consumer's heap buffer when the local user pastes clipboard file contents offered by the remote side. The file is a fork of FreeRDP's client/Windows/wf_cliprdr.c, where the same defect is CVE-2026-68579, fixed in FreeRDP 3.30.0.","status":"published","published":"2026-08-24T13:11:58.408Z","modified":"2026-11-09T02:47:16.659558108Z","cvss":[{"version":"4.0","score":8.5,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:L/SI:H/SA:H","level":"high"}],"cwes":["CWE-20","CWE-787"],"updated_at":"2026-11-09T03:16:17.543303Z"},{"id":"DEBIAN-CVE-2026-68579","description":"FreeRDP before 3.30.0 (\u003c= 3.29.0) contains a heap-based buffer overflow in the Windows clipboard client's CliprdrStream_Read function (client/Windows/wf_cliprdr.c). When an OLE paste consumer (e.g. explorer.exe) calls IStream::Read with a fixed-size buffer of cb bytes, CliprdrStream_Read requests file contents from the RDP server and then copies the response into the caller's buffer using the server-supplied length (req_fsize) instead of cb. A malicious or compromised RDP server can return an oversized CB_FILECONTENTS_RESPONSE, causing an out-of-bounds write of attacker-controlled data into the paste consumer's heap buffer when a user pastes server-offered clipboard file contents.","status":"published","published":"2026-08-02T13:16:53.8Z","modified":"2026-09-30T09:00:16.469769336Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"updated_at":"2026-11-02T15:46:02.094661Z"},{"id":"UBUNTU-CVE-2026-68579","description":"FreeRDP before 3.30.0 (\u003c= 3.29.0) contains a heap-based buffer overflow in the Windows clipboard client's CliprdrStream_Read function (client/Windows/wf_cliprdr.c). When an OLE paste consumer (e.g. explorer.exe) calls IStream::Read with a fixed-size buffer of cb bytes, CliprdrStream_Read requests file contents from the RDP server and then copies the response into the caller's buffer using the server-supplied length (req_fsize) instead of cb. A malicious or compromised RDP server can return an oversized CB_FILECONTENTS_RESPONSE, causing an out-of-bounds write of attacker-controlled data into the paste consumer's heap buffer when a user pastes server-offered clipboard file contents.","status":"published","published":"2026-08-02T13:16:00Z","modified":"2026-08-17T23:45:25.767864764Z","cvss":[{"version":"3.1","score":9.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:H","level":"critical"},{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:56:57.159276Z"}]}}