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★ 0f4alireza2023-10-17CandidateSource timeline
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Record history
Record created from the first normalized source observation.
Metadata and source references refreshed.