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CVE-2022-41040: Microsoft Exchange Server Server-Side Request Forgery Vulnerability

criticalknown exploitedpublic exploitCVE-2022-41040
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Microsoft Exchange Server allows for server-side request forgery. Dubbed "ProxyNotShell," this vulnerability is chainable with CVE-2022-41082 which allows for remote code execution.

CSIRTS triage

vendor: Microsoftproduct: Exchange ServerRemote code executionServer-side request forgery
What
Microsoft Exchange Server allows for server-side request forgery.
Who is affected
Deployments of Microsoft Exchange Server are affected.
Urgency
Remediation is urgent due to active exploitation and critical severity.
Action
Apply the latest security updates to mitigate the vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2022-09-30
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2022-41040

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2022-41040coverage & exploitation statusNVD · CVE.org

Recent advisories for Microsoft Exchange Server

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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