{"id":"CVE-2026-66303","title":"Null pointer dereference in Skype for Business allows an authorized attacker to deny service over a network.","summary":"Null pointer dereference in Skype for Business allows an authorized attacker to deny service over a network.","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-476"],"vendor":"microsoft","product":"skype_for_business_server","affected":["skype_for_business_server = 2015","skype_for_business_server = 2019","skype_for_business_server_subscription_edition = 7.0.2046.849"],"published":"2026-09-08","updated":"2026-09-16","sourceUpdated":"2026-09-16T19:23:02.977","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-66303","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66303","label":"secure@microsoft.com"}],"tags":["nvd","cve.org"],"epss":0.00791,"epssPercentile":0.5481,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-08T20:38:45.923349Z"},"ingestedAt":"2026-09-08T19:08:49.637Z","slug":"CVE-2026-66303","body":"## Overview\n\nNull pointer dereference in Skype for Business allows an authorized attacker to deny service over a network.\n\n## Affected\n\n- `skype_for_business_server = 2015`\n- `skype_for_business_server = 2019`\n- `skype_for_business_server_subscription_edition = 7.0.2046.849`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}