{"id":"CVE-2019-19945","aliases":["EUVD-2019-9533","GHSA-v643-533g-6c85"],"status":"published","title":"uhttpd in OpenWrt through 18.06.5 and 19.x through 19.07.0-rc2 has an integer signedness error....","description":"uhttpd in OpenWrt through 18.06.5 and 19.x through 19.07.0-rc2 has an integer signedness error. This leads to out-of-bounds access to a heap buffer and a subsequent crash. It can be triggered with an HTTP POST request to a CGI script, specifying both \"Transfer-Encoding: chunked\" and a large negative Content-Length value.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01551,"percentile":0.75302,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-125","CWE-681"],"published":"2020-03-16T17:17:19Z","modified":"2026-06-17T02:27:29Z","exploits":[{"source":"pocgithub","id":"delicateByte/CVE-2019-19945_Test","title":"delicateByte/CVE-2019-19945_Test","date":"2022-06-21","url":"https://github.com/delicateByte/CVE-2019-19945_Test"}],"products":[{"vendor":"openwrt","product":"openwrt"}],"references":[{"url":"https://github.com/openwrt/openwrt/commits/master","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory"]},{"url":"https://openwrt.org/advisory/2020-01-13-1","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-19945"},{"url":"https://github.com/advisories/GHSA-v643-533g-6c85"}],"sources":{"cve":[{"id":"CVE-2019-19945","description":"uhttpd in OpenWrt through 18.06.5 and 19.x through 19.07.0-rc2 has an integer signedness error. This leads to out-of-bounds access to a heap buffer and a subsequent crash. It can be triggered with an HTTP POST request to a CGI script, specifying both \"Transfer-Encoding: chunked\" and a large negative Content-Length value.","status":"published","published":"2020-03-16T17:17:19Z","modified":"2024-08-05T02:32:09.964Z","updated_at":"2026-11-02T14:20:20.74896Z"}],"euvd":[{"id":"EUVD-2019-9533","description":"uhttpd in OpenWrt through 18.06.5 and 19.x through 19.07.0-rc2 has an integer signedness error. This leads to out-of-bounds access to a heap buffer and a subsequent crash. It can be triggered with an HTTP POST request to a CGI script, specifying both \"Transfer-Encoding: chunked\" and a large negative Content-Length value.","status":"published","published":"2020-03-16T17:17:19Z","modified":"2024-08-05T02:32:09Z","updated_at":"2026-11-03T02:40:23.78072Z"}],"ghsa":[{"id":"GHSA-v643-533g-6c85","title":"uhttpd in OpenWrt through 18.06.5 and 19.x through 19.07.0-rc2 has an integer signedness error....","description":"uhttpd in OpenWrt through 18.06.5 and 19.x through 19.07.0-rc2 has an integer signedness error. This leads to out-of-bounds access to a heap buffer and a subsequent crash. It can be triggered with an HTTP POST request to a CGI script, specifying both \u0026quot;Transfer-Encoding: chunked\u0026quot; and a large negative Content-Length value.","status":"published","published":"2022-05-24T17:11:34Z","modified":"2023-06-02T05:00:59Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:54:37.773458Z"}],"nvd":[{"id":"CVE-2019-19945","description":"uhttpd in OpenWrt through 18.06.5 and 19.x through 19.07.0-rc2 has an integer signedness error. This leads to out-of-bounds access to a heap buffer and a subsequent crash. It can be triggered with an HTTP POST request to a CGI script, specifying both \"Transfer-Encoding: chunked\" and a large negative Content-Length value.","status":"published","published":"2020-03-16T18:15:12.213Z","modified":"2026-06-17T02:27:29.47Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-125","CWE-681"],"updated_at":"2026-11-02T14:05:45.254119Z"}]}}