{"id":"CVE-2022-20813","aliases":["EUVD-2022-26063","GHSA-4w83-58w6-759f"],"status":"published","title":"Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities","description":"Multiple vulnerabilities in the API and in the web-based management interface of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow a remote attacker to overwrite arbitrary files or conduct null byte poisoning attacks on an affected device. Note: Cisco Expressway Series refers to the Expressway Control (Expressway-C) device and the Expressway Edge (Expressway-E) device. For more information about these vulnerabilities, see the Details section of this advisory.","severity":{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:L","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01135,"percentile":0.66725,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-158","CWE-295"],"published":"2022-07-06T20:30:45Z","modified":"2026-06-17T04:25:10Z","products":[{"vendor":"cisco","product":"cisco telepresence video communication server (vcs) expressway"},{"vendor":"cisco","product":"expressway"},{"vendor":"cisco","product":"telepresence_video_communication_server"}],"references":[{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-overwrite-3buqW8LH","tags":["vendor-advisory","x_refsource_CISCO","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-20813"},{"url":"https://github.com/advisories/GHSA-4w83-58w6-759f"}],"sources":{"cve":[{"id":"CVE-2022-20813","title":"Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities","description":"Multiple vulnerabilities in the API and in the web-based management interface of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow a remote attacker to overwrite arbitrary files or conduct null byte poisoning attacks on an affected device. Note: Cisco Expressway Series refers to the Expressway Control (Expressway-C) device and the Expressway Edge (Expressway-E) device. For more information about these vulnerabilities, see the Details section of this advisory.","status":"published","published":"2022-07-06T20:30:45.861Z","modified":"2024-11-06T16:11:39.563Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:L","level":"critical","assessor":"cna"}],"cwes":["CWE-158"],"updated_at":"2026-11-02T14:34:24.234074Z"}],"euvd":[{"id":"EUVD-2022-26063","description":"Multiple vulnerabilities in the API and in the web-based management interface of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow a remote attacker to overwrite arbitrary files or conduct null byte poisoning attacks on an affected device. Note: Cisco Expressway Series refers to the Expressway Control (Expressway-C) device and the Expressway Edge (Expressway-E) device. For more information about these vulnerabilities, see the Details section of this advisory.","status":"published","published":"2022-07-06T20:30:45Z","modified":"2024-11-06T16:11:39Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:L","level":"critical"}],"updated_at":"2026-11-03T00:05:10.085157Z"}],"ghsa":[{"id":"GHSA-4w83-58w6-759f","title":"Multiple vulnerabilities in the API and in the web-based management interface of Cisco Expressway...","description":"Multiple vulnerabilities in the API and in the web-based management interface of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow a remote attacker to overwrite arbitrary files or conduct null byte poisoning attacks on an affected device. Note: Cisco Expressway Series refers to the Expressway Control (Expressway-C) device and the Expressway Edge (Expressway-E) device. For more information about these vulnerabilities, see the Details section of this advisory.","status":"published","published":"2022-07-07T00:00:23Z","modified":"2023-01-27T05:05:23Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:42:41.402468Z"}],"nvd":[{"id":"CVE-2022-20813","description":"Multiple vulnerabilities in the API and in the web-based management interface of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow a remote attacker to overwrite arbitrary files or conduct null byte poisoning attacks on an affected device. Note: Cisco Expressway Series refers to the Expressway Control (Expressway-C) device and the Expressway Edge (Expressway-E) device. For more information about these vulnerabilities, see the Details section of this advisory.","status":"published","published":"2022-07-06T21:15:11.693Z","modified":"2026-06-17T04:25:10.003Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:L","level":"critical","assessor":"secondary"},{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-158","CWE-295"],"updated_at":"2026-11-02T14:07:22.966735Z"}]}}