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

Source: https://junglewise.ai/threats/cve-2022-41040-microsoft-exchange-server-server-side-request-forgery  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-09-30. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2022-41040 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2022-09-30

Microsoft Exchange Server is vulnerable to a Server-Side Request Forgery (SSRF) vulnerability known as 'ProxyNotShell'. An authenticated attacker can leverage this to gain elevated privileges and potentially chain it with CVE-2022-41082 for remote code execution.

Technologies: [Microsoft Exchange Server](https://junglewise.ai/threats/technologies/exchange-server). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2022-41040 exploited in the wild?** Yes. CVE-2022-41040 is known to be exploited in the wild, first recorded on 30 September 2022. Treat it as urgent.

**How severe is CVE-2022-41040?** Critical severity, with a CVSS score of 8.8, published 30 September 2022.

**Which products and versions are affected?** Microsoft Exchange Server.

**Is there a fix for CVE-2022-41040?** A patch was published on 2022-11-08: Microsoft released official patches during November Patch Tuesday. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2022-41040 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2022-41040?** Check whether you run Microsoft Exchange Server. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Microsoft Exchange Server

## Timeline

- 2022-09-30: disclosed: Vulnerability published and added to CISA KEV catalog.
- 2022-09-30: exploited: Reported as exploited in the wild at the time of publication.
- 2022-11-08: patched: Microsoft released official patches during November Patch Tuesday.

## Related threats

- [Microsoft Exchange Server improper access control spoofing](https://junglewise.ai/threats/cve-2026-118208-improper-access-control-in-microsoft-exchange-server-allows-an)
- [Microsoft Exchange Server improper input validation code execution](https://junglewise.ai/threats/cve-2026-118207-improper-input-validation-in-microsoft-exchange-server-allows-an)
- [Microsoft Exchange Server weak authentication privilege elevation](https://junglewise.ai/threats/cve-2026-118157-weak-authentication-in-microsoft-exchange-server-allows-an)
- [Microsoft Exchange Server privilege elevation via untrusted security decision input](https://junglewise.ai/threats/cve-2026-118154-reliance-on-untrusted-inputs-in-a-security-decision-in-microsoft)
- [Microsoft Exchange Server algorithmic complexity denial of service](https://junglewise.ai/threats/cve-2026-118153-inefficient-algorithmic-complexity-in-microsoft-exchange-server)