ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2022-41040

Microsoft Exchange Server Server-Side Request Forgery Vulnerability

Published Sep 29, 2022 · catalog updated Jun 16, 2026 · Microsoft Exchange Server

Patch now

CVE-2022-41040 is in the CISA known-exploited catalog, due Oct 21, 2022. Confirm Microsoft Exchange Server against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
High8.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
99.96%
Remediation
Remediation guidance
Affected products
cpe microsoft/exchange server · vendor Microsoft Exchange Server

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. Initial-access exploit intelligence.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe microsoft/exchange server2013
  • cpe microsoft/exchange server2016
  • cpe microsoft/exchange server2019
  • vendor Microsoft Exchange Serverversion unspecified

How to fix CVE-2022-41040

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2022-41040 is in the CISA known-exploited catalog, due Oct 21, 2022. Confirm Microsoft Exchange Server against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with microsoft/exchange server 2013; microsoft/exchange server 2016; microsoft/exchange server 2019. Apply updates per vendor instructions.

What should an analyst verify?

CWE-918: Server-Side Request Forgery (SSRF). EPSS 99.96%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 30, 2022 · Catalog

    Detected

    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.

  2. Sep 30, 2022 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Oct 21, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    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.

Sources

  • CISA KEVConfirmed exploitationCVE-2022-41040

    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.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2022-41040

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2022-41040

    30-day exploitation probability 100.0%

    first.org
  • Metasploit ModulesPublic exploit moduleexploit_windows/http/exchange_proxynotshell_rce

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDVulnerability recordCVE-2022-41040

    Microsoft Exchange Server Elevation of Privilege Vulnerability

    nvd.nist.gov
  • Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/170066/Microsoft-Exchange-ProxyNotShell-Remote-Code-Execution.html

    Packet Storm link already published on the finding.

    packetstormsecurity.com
  • VulnCheck KEVConfirmed exploitationCVE-2022-41040

    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.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.