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Microsoft Exchange Server Remote Code Execution Vulnerability

Microsoft Exchange Server contains an unspecified vulnerability that allows for remote code execution.

Published 24 Sep 2026Updated 24 Sep 2026472 sources
CVSS 10.0 PoC CANDIDATE△ CISA KEV
Overview Sources History

What happened

Microsoft Exchange Server contains an unspecified vulnerability that allows for remote code execution.

Affected versions

Exchange Server: See original advisory Fixed: See vendor advisory.

Why it matters

This source correlation may provide earlier visibility while structured CVE metadata is still being updated.

Detection & mitigation

  • Review the original advisory and validate affected versions.
  • Apply vendor-provided updates or mitigations when available.

Public PoC references

RepositoryAuthorFirst seenReference
SploitusScanner for CVE-2021-34473 ProxyShell vulnerability in Microsoft Exchange On-premise.KitPloit2026-09-22T05:53:32Candidatekitploit.comScanner for CVE-2021-34473 ProxyShell vulnerability in Microsoft Exchange On-premise.ru2026-09-22T05:53:32CandidatePoC-in-GitHub · cyberheartmi9/Proxyshell-Scannernuclei scanner for proxyshell ( CVE-2021-34473 )★ 46cyberheartmi92021-08-10CandidatePoC-in-GitHub · RaouzRouik/CVE-2021-34473-scannerScanner for CVE-2021-34473, ProxyShell, A Microsoft Exchange On-premise Vulnerability★ 5RaouzRouik2021-08-11CandidatePoC-in-GitHub · p2-98/CVE-2021-34473CVE-2021-34473 Microsoft Exchange Server Remote Code Execution Vulnerability★ 30p2-982021-08-16CandidatePoC-in-GitHub · horizon3ai/proxyshellProof of Concept for CVE-2021-34473, CVE-2021-34523, and CVE-2021-31207★ 121horizon3ai2021-09-04CandidatePoC-in-GitHub · je6k/CVE-2021-34473-Exchange-ProxyShell对Exchange Proxyshell 做了二次修改，精确的拆分、实现辅助性安全测试。★ 16je6k2021-11-22CandidatePoC-in-GitHub · learningsurface/ProxyShell-CVE-2021-34473.pyA simple script to check for ProxyShell★ 0learningsurface2022-05-24CandidatePoC-in-GitHub · kh4sh3i/ProxyShellCVE-2021-34473 Microsoft Exchange Server Remote Code Execution Vulnerability★ 43kh4sh3i2022-06-29CandidatePoC-in-GitHub · ipsBruno/CVE-2021-34473-NMAP-SCANNERA massive scanner for CVE-2021-34473 Microsoft Exchange Windows Vulnerability★ 2ipsBruno2022-11-16CandidatePoC-in-GitHub · f4alireza/CVEProxyshell for Exploiting CVE-2021-34473★ 0f4alireza2023-10-17Candidate
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