CVE-2026-41940

CRITICALNVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-04-30), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 9.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 98%CVSS: 9.8Exploit: 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.

cPanel and WHM versions after 11.40 contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

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
Severity98% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
98%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

April 29, 2026

Last Modified

May 4, 2026

Advisory Details (8)

Auto-updated Jul 27, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: 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-2026-41940
generic

GitHub - watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.py · GitHub

https://github.com/watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.py
generic🔴 Active Exploitation

Critrical cPanel flaw mass-exploited in "Sorry" ransomware attacks

https://www.bleepingcomputer.com/news/security/critrical-cpanel-flaw-mass-exploited-in-sorry-ransomware-attacks/
generic

The Internet Is Falling Down, Falling Down, Falling Down (cPanel & WHM Authentication Bypass CVE-2026-41940)

https://labs.watchtowr.com/the-internet-is-falling-down-falling-down-falling-down-cpanel-whm-authentication-bypass-cve-2026-41940/
generic

WebPros cPanel and WHM Authentication Bypass via Login Flow | Advisories | VulnCheck

https://www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flow
generic

Namecheap Status - Namecheap Status

https://www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026
generic

WP Squared Changelog - WP2

https://docs.wpsquared.com/changelogs/versions/changelog/#13617
generic🔴 Active Exploitation

Release Notes | cPanel & WHM Documentation

https://docs.cpanel.net/release-notes/release-notes

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 35× in last 7d / 185× 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 408 total refreshes for this CVE.

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

Publicly available exploits

(10 references)

Working exploit code is in the public domain (9 GitHub PoCs) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCCerberusMrXi/cPanel-WHM-CVE-2026-41940-auth-bypass-exploit
    First seen Jul 26, 2026

    Critical authentication bypass exploit for cPanel/WHM CVE-2026-41940. Leverages CRLF injection in cpsrvd daemon to gain root WHM access without credentials. Includes version detection, verbose logging, proxy support, JSON reporting, and post-exploitation account enumeration. For authorized security testing only.

    Open source ↗
  • GitHub PoCaquace/CVE-2026-41940-PoC
    First seen Jun 28, 2026

    CVE-2026-41940 authentication bypass vulnerability proof-of-concept

    Open source ↗
  • GitHub PoCclsmight/CVE-2026-41940-PoC
    First seen Jun 16, 2026

    CVE-2026-41940 exploitation proof-of-concept project

    Open source ↗
  • GitHub PoColofsatte/CVE-2026-41940-PoC
    First seen Jun 4, 2026

    CVE-2026-41940 is a critical authentication bypass vulnerability affecting cPanel and WHM. This repository is designed to demonstrate its Proof-Of-Concept

    Open source ↗
  • GitHub PoCwillygailo/CVE-2026-41940-Linux
    First seen May 27, 2026

    ⚠️ DISCLAIMER: This tool is intended for authorized penetration testing and educational purposes only. Using this tool against systems without explicit written permission is illegal. The developers are not responsible for any misuse or damage caused.

    Open source ↗
  • Exploit-DBEDB-52574
    First seen May 26, 2026

    cPanel - CRLF Injection

    Open source ↗
  • GitHub PoCtc4dy/CVE-2026-41940-PoC-Exploit
    First seen May 12, 2026

    🚀 CVE-2026-41940 cPanel/WHM Auth Bypass Exploit - Best Flow 💥 CRLF injection leads to auth bypass, session hijacking & account leak. ✅ Proxy, custom UA, keep-alive, retries, SSL verify, colored output, file save support. ⚡ Advanced PoC for pentesters.

    Open source ↗
  • GitHub PoC44pie/cpsniper
    First seen May 10, 2026

    cPanelSniper STABLE - CVE-2026-41940 optimized for 10M+ targets

    Open source ↗
  • GitHub PoCbughunt4me/cpanelCVE-2026-41940
    First seen May 6, 2026

    CVE-2026-41940 Auto Root Login

    Open source ↗
  • GitHub PoChabibkaratas/sorry-ransomware-analysis
    First seen May 4, 2026

    Sorry ransomware (.sorry) IOCs, YARA rules and forensic analysis - CVE-2026-41940 cPanel campaign

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2026-41940?
CVE-2026-41940 is a critical vulnerability published on April 29, 2026. cPanel and WHM versions after 11.40 contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.
When was CVE-2026-41940 disclosed?
CVE-2026-41940 was first published in the National Vulnerability Database on April 29, 2026, with the most recent update on May 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-41940 actively exploited?
Yes. CISA added CVE-2026-41940 to the Known Exploited Vulnerabilities catalog on April 30, 2026, affecting WebPros cPanel & WHM and WP2 (WordPress Squared). KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2026-41940?
CVE-2026-41940 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2026-41940?
CVE-2026-41940 affects WebPros cPanel & WHM and WP2 (WordPress Squared). 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-2026-41940?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-41940, 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-2026-41940

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