{"id":"CVE-2023-36745","published":"2023-09-12T16:58:31Z","modified":"2025-10-30T18:17:58Z","title":"Microsoft Exchange Server Remote Code Execution Vulnerability","vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 13","tier":"core","eol":null,"affectedVersions":[{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 13","versions":[">= 15.02.0, < 15.02.1258.025"]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2019 Cumulative Update 12","versions":[">= 15.02.0, < 15.02.1118.037"]},{"vendor":"Microsoft","product":"Microsoft Exchange Server 2016 Cumulative Update 23","versions":[">= 15.01.0, < 15.01.2507.032"]}],"description":{"text":"Microsoft Exchange Server Remote Code Execution Vulnerability","provenance":"source","from":"CVE.org"},"summary":{"text":"Microsoft Exchange Server 2019 Cumulative Update 13 contains a remote code execution flaw involving deserialization of untrusted data. An attacker with adjacent network access and low-privilege authentication, requiring no user interaction, can execute code with high impact to confidentiality, integrity and availability.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-29T07:12:46Z"},"cvss":{"score":8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.76169,"percentile":0.99533,"date":"2026-10-29","provenance":"source"},"kev":null,"vulncheckKev":{"dateAdded":"2024-05-24","exploitedFirstSeen":"2024-05-24","ransomware":false,"evidence":[{"url":"https://rt-solar.ru/solar-4rays/blog/4333/","date":"2024-05-24"},{"url":"https://rt-solar.ru/solar-4rays/blog/4527/","date":"2024-07-18"}],"evidenceTotal":2,"provenance":"source"},"exploited":true,"otx":{"pulseCount":1,"pulses":[{"name":"Zero Day Initiative Exploiting Exchange PowerShell After ProxyNotShell","url":"https://otx.alienvault.com/pulse/66e3205c970a75c810a80555","created":"2024-09-12"}],"provenance":"machine"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36745","tags":["vendor-advisory"]}],"techniques":[],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2023-40688","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-40688","exploited":false,"exploitedSince":null,"provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":1,"skipped":0,"earliest":"2023-10-23","earliestUrl":"https://github.com/N1k0la-T/CVE-2023-36745","repos":[{"name":"N1k0la-T/CVE-2023-36745","url":"https://github.com/N1k0la-T/CVE-2023-36745","stars":168,"created":"2023-10-23"}]},"first":{"date":"2023-10-23","source":"PoC-in-GitHub","url":"https://github.com/N1k0la-T/CVE-2023-36745"},"provenance":"source"},"exploitRefs":[],"flow":[],"timeline":[{"date":"2023-09-12","kind":"published","label":"Published (CVE.org)","url":"https://www.cve.org/CVERecord?id=CVE-2023-36745","provenance":"source"},{"date":"2023-10-23","kind":"exploit-public","label":"First public exploit: PoC-in-GitHub","url":"https://github.com/N1k0la-T/CVE-2023-36745","provenance":"source"},{"date":"2024-05-24","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://rt-solar.ru/solar-4rays/blog/4333/","provenance":"source"}],"speed":{"daysToPublicExploit":41,"firstExploitFrom":"PoC-in-GitHub","daysToKev":null},"priority":{"score":66.2,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 888 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":19.91,"detail":"percentile 0.9953"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 PoC-in-GitHub repo"},{"name":"Mentioned in OTX pulses","points":0.68,"detail":"1 pulse"},{"name":"CVSS severity","points":5.6,"detail":"base score 8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]},"lineage":{"familyId":"fam-class-microsoft-exchange-server-cwe-502"}}