{"id":"CVE-2026-63523","aliases":["EUVD-2026-73936","GHSA-cgvg-jx73-642p"],"status":"published","title":"Skype for Business Spoofing Vulnerability","description":"Improper neutralization of input during web page generation ('cross-site scripting') in Skype for Business allows an unauthorized attacker to perform spoofing over a network.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00553,"percentile":0.46542,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2026-09-08T18:32:28Z","modified":"2026-11-10T21:31:02Z","products":[{"vendor":"microsoft","product":"skype for business server 2015 cu13"},{"vendor":"microsoft","product":"skype for business server 2019 cu8"},{"vendor":"microsoft","product":"skype for business server subscription edition cu1"},{"vendor":"microsoft","product":"skype_for_business_server"},{"vendor":"microsoft","product":"skype_for_business_server_subscription_edition"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-63523","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63523"},{"url":"https://github.com/advisories/GHSA-cgvg-jx73-642p"}],"sources":{"cve":[{"id":"CVE-2026-63523","title":"Skype for Business Spoofing Vulnerability","description":"Improper neutralization of input during web page generation ('cross-site scripting') in Skype for Business allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2026-09-08T18:32:28.787Z","modified":"2026-11-10T21:31:02.227Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-10T22:48:52.144232Z"}],"euvd":[{"id":"EUVD-2026-73936","description":"Improper neutralization of input during web page generation ('cross-site scripting') in Skype for Business allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2026-09-08T18:32:28Z","modified":"2026-11-10T21:31:02Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-10T22:23:53.008995Z"}],"ghsa":[{"id":"GHSA-cgvg-jx73-642p","title":"Improper neutralization of input during web page generation ('cross-site scripting') in Skype for...","description":"Improper neutralization of input during web page generation ('cross-site scripting') in Skype for Business allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2026-09-08T21:34:16Z","modified":"2026-09-08T21:34:26Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:11:35.275364Z"}],"nvd":[{"id":"CVE-2026-63523","description":"Improper neutralization of input during web page generation ('cross-site scripting') in Skype for Business allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2026-09-08T19:18:07.267Z","modified":"2026-09-16T19:21:56.487Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:12:45.264578Z"}]}}