CVE-2022-41040

CRITICALNVD 8.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-09-30), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 3 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 100%CVSS: 8.8Exploit: cisa kev · ssvc active · kev ransomware · Metasploit · epss top5pct · epss high · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Microsoft Exchange Server Elevation of Privilege Vulnerability

CVSS v3
8.8
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
100%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

October 3, 2022

Last Modified

October 30, 2025

Advisory Details (6)

Auto-updated Jun 2, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: microsoft, cert, cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-41040
generic🔴 Active Exploitation

Microsoft November Patch Tuesday 2022 Addresses 65 Vulnerabilities inc | SecPod

https://www.secpod.com/blog/microsoft-november-2022-patch-tuesday-patches-65-vulnerabilities-including-6-zero-days/
cert Patch Available

VU#915563 - Microsoft Exchange vulnerable to server-side request forgery and remote code execution.

https://www.kb.cert.org/vuls/id/915563
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-41040
generic

Packet Storm

http://packetstormsecurity.com/files/170066/Microsoft-Exchange-ProxyNotShell-Remote-Code-Execution.html
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-41040

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 79× in last 7d / 329× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 1,099 total refreshes for this CVE.

  1. 2026-09-08 14:05 UTCVendor advisory
  2. 2026-09-08 14:05 UTCGHSA enrichment
  3. 2026-09-08 09:41 UTCVendor advisory
  4. 2026-09-08 09:41 UTCGHSA enrichment
  5. 2026-09-08 05:17 UTCVendor advisory
  6. 2026-09-08 05:16 UTCGHSA enrichment
  7. 2026-09-08 00:55 UTCVendor advisory
  8. 2026-09-08 00:55 UTCGHSA enrichment
  9. 2026-09-07 20:35 UTCVendor advisory
  10. 2026-09-07 20:35 UTCGHSA enrichment
  11. 2026-09-07 16:16 UTCVendor advisory
  12. 2026-09-07 16:15 UTCGHSA enrichment
  13. 2026-09-07 11:56 UTCVendor advisory
  14. 2026-09-07 11:55 UTCGHSA enrichment
  15. 2026-09-07 07:32 UTCVendor advisory
  16. 2026-09-07 07:32 UTCGHSA enrichment
  17. 2026-09-07 03:10 UTCVendor advisory
  18. 2026-09-07 03:09 UTCGHSA enrichment
  19. 2026-09-06 22:49 UTCVendor advisory
  20. 2026-09-06 22:49 UTCGHSA enrichment
  21. 2026-09-06 18:26 UTCVendor advisory
  22. 2026-09-06 18:26 UTCGHSA enrichment
  23. 2026-09-06 14:05 UTCVendor advisory
  24. 2026-09-06 14:05 UTCGHSA enrichment
  25. 2026-09-06 09:45 UTCVendor advisory
Show 75 more
  1. 2026-09-06 09:45 UTCGHSA enrichment
  2. 2026-09-06 05:25 UTCVendor advisory
  3. 2026-09-06 05:25 UTCGHSA enrichment
  4. 2026-09-06 01:05 UTCVendor advisory
  5. 2026-09-06 01:05 UTCGHSA enrichment
  6. 2026-09-05 20:42 UTCVendor advisory
  7. 2026-09-05 20:42 UTCGHSA enrichment
  8. 2026-09-05 16:22 UTCVendor advisory
  9. 2026-09-05 16:22 UTCGHSA enrichment
  10. 2026-09-05 12:03 UTCVendor advisory
  11. 2026-09-05 12:03 UTCGHSA enrichment
  12. 2026-09-05 07:40 UTCVendor advisory
  13. 2026-09-05 07:40 UTCGHSA enrichment
  14. 2026-09-05 03:20 UTCVendor advisory
  15. 2026-09-05 03:20 UTCGHSA enrichment
  16. 2026-09-04 23:00 UTCVendor advisory
  17. 2026-09-04 22:59 UTCGHSA enrichment
  18. 2026-09-04 18:39 UTCVendor advisory
  19. 2026-09-04 18:39 UTCGHSA enrichment
  20. 2026-09-04 17:38 UTCCISA KEV update
  21. 2026-09-04 14:17 UTCVendor advisory
  22. 2026-09-04 14:17 UTCGHSA enrichment
  23. 2026-09-04 09:57 UTCVendor advisory
  24. 2026-09-04 09:56 UTCGHSA enrichment
  25. 2026-09-04 05:36 UTCVendor advisory
  26. 2026-09-04 05:36 UTCGHSA enrichment
  27. 2026-09-04 01:14 UTCVendor advisory
  28. 2026-09-04 01:14 UTCGHSA enrichment
  29. 2026-09-03 20:52 UTCVendor advisory
  30. 2026-09-03 20:52 UTCGHSA enrichment
  31. 2026-09-03 16:32 UTCVendor advisory
  32. 2026-09-03 16:32 UTCGHSA enrichment
  33. 2026-09-03 12:12 UTCVendor advisory
  34. 2026-09-03 12:12 UTCGHSA enrichment
  35. 2026-09-03 07:52 UTCVendor advisory
  36. 2026-09-03 07:52 UTCGHSA enrichment
  37. 2026-09-03 03:30 UTCVendor advisory
  38. 2026-09-03 03:30 UTCGHSA enrichment
  39. 2026-09-02 23:09 UTCVendor advisory
  40. 2026-09-02 23:09 UTCGHSA enrichment
  41. 2026-09-02 18:47 UTCGHSA enrichment
  42. 2026-09-02 17:33 UTCCISA KEV update
  43. 2026-09-02 14:26 UTCVendor advisory
  44. 2026-09-02 14:26 UTCGHSA enrichment
  45. 2026-09-02 10:04 UTCVendor advisory
  46. 2026-09-02 10:04 UTCGHSA enrichment
  47. 2026-09-02 05:42 UTCVendor advisory
  48. 2026-09-02 05:42 UTCGHSA enrichment
  49. 2026-09-02 01:21 UTCVendor advisory
  50. 2026-09-02 01:21 UTCGHSA enrichment
  51. 2026-09-01 21:00 UTCVendor advisory
  52. 2026-09-01 21:00 UTCGHSA enrichment
  53. 2026-09-01 16:40 UTCVendor advisory
  54. 2026-09-01 16:40 UTCGHSA enrichment
  55. 2026-09-01 12:18 UTCVendor advisory
  56. 2026-09-01 12:18 UTCGHSA enrichment
  57. 2026-09-01 07:57 UTCVendor advisory
  58. 2026-09-01 07:57 UTCGHSA enrichment
  59. 2026-09-01 03:35 UTCVendor advisory
  60. 2026-09-01 03:34 UTCGHSA enrichment
  61. 2026-08-31 23:13 UTCVendor advisory
  62. 2026-08-31 23:13 UTCGHSA enrichment
  63. 2026-08-31 18:54 UTCVendor advisory
  64. 2026-08-31 18:53 UTCGHSA enrichment
  65. 2026-08-31 14:30 UTCVendor advisory
  66. 2026-08-31 14:30 UTCGHSA enrichment
  67. 2026-08-31 14:19 UTCCISA KEV update
  68. 2026-08-31 10:09 UTCVendor advisory
  69. 2026-08-31 10:08 UTCGHSA enrichment
  70. 2026-08-31 05:44 UTCVendor advisory
  71. 2026-08-31 05:44 UTCGHSA enrichment
  72. 2026-08-31 01:25 UTCVendor advisory
  73. 2026-08-31 01:25 UTCGHSA enrichment
  74. 2026-08-30 21:05 UTCVendor advisory
  75. 2026-08-30 21:05 UTCGHSA enrichment

Publicly available exploits

(8 references)

Working exploit code is in the public domain (2 Metasploit modules) (6 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCTaroballzChen/CVE-2022-41040-metasploit-ProxyNotShell
    First seen Oct 20, 2022

    the metasploit script(POC) about CVE-2022-41040. Microsoft Exchange are vulnerable to a server-side request forgery (SSRF) attack. An authenticated attacker can use the vulnerability to elevate privileges.

    Open source ↗
  • GitHub PoCrjsudlow/proxynotshell-IOC-Checker
    First seen Oct 9, 2022

    Script to check for IOC's created by ProxyNotShell (CVE-2022-41040 & CVE-2022-41082)

    Open source ↗
  • GitHub PoCkljunowsky/CVE-2022-41040-POC
    First seen Oct 9, 2022

    CVE-2022-41040 - Server Side Request Forgery (SSRF) in Microsoft Exchange Server

    Open source ↗
  • GitHub PoCd3duct1v/CVE-2022-41040
    First seen Oct 6, 2022

    Code set relating to CVE-2022-41040

    Open source ↗
  • GitHub PoCr3dcl1ff/CVE-2022-41040
    First seen Oct 4, 2022

    mitigation script for MS Exchange server vuln

    Open source ↗
  • GitHub PoCnumanturle/CVE-2022-41040
    First seen Oct 2, 2022

    CVE-2022-41040 nuclei template

    Open source ↗
  • Metasploitexploit/windows/http/exchange_proxynotshell_rce✓ verified
    First seen Sep 30, 2022

    ProxyNotShell — Exchange Server post-auth RCE via PowerShell remoting.

    Open source ↗
  • Metasploitexploit/windows/http/exchange_proxynotshell_rce✓ verified
    First seen Sep 28, 2022

    Microsoft Exchange ProxyNotShell RCE

    Open source ↗

Frequently asked(6)

What is CVE-2022-41040?
CVE-2022-41040 is a critical vulnerability published on October 3, 2022. Microsoft Exchange Server Elevation of Privilege Vulnerability
When was CVE-2022-41040 disclosed?
CVE-2022-41040 was first published in the National Vulnerability Database on October 3, 2022, with the most recent update on October 30, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-41040 actively exploited?
Yes. CISA added CVE-2022-41040 to the Known Exploited Vulnerabilities catalog on September 30, 2022, affecting Microsoft Exchange Server. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2022-41040?
CVE-2022-41040 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2022-41040?
CVE-2022-41040 affects Microsoft Exchange Server. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2022-41040?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-41040, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2022-41040

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