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 — 5 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 53× in last 7d / 311× 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 635 total refreshes for this CVE.

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

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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