Exploitation evidence
Known exploited · CISA KEV listed
Added 2026-04-30. Ransomware campaign use: Known.
CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA due date: 2026-05-03. This is the catalog’s deadline, not an assessment of your organization’s exposure.
KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗Reported products and versions
WebPros / cPanel
Default status: affected
- affected: 11.40.0.0 to < 11.86.0.41 (custom)
- affected: 11.88.0.0 to < 11.94.0.28 (custom)
- affected: 11.96.0.0 to < 11.102.0.39 (custom)
- affected: 11.104.0.0 to < 11.110.0.97 (custom)
- affected: 11.112.0.0 to < 11.118.0.63 (custom)
- affected: 11.120.0.0 to < 11.124.0.35 (custom)
- affected: 11.126.0.0 to < 11.126.0.54 (custom)
- affected: 11.128.0.0 to < 11.130.0.19 (custom)
- affected: 11.132.0.0 to < 11.132.0.29 (custom)
- affected: 11.134.0.0 to < 11.134.0.20 (custom)
- affected: 11.136.0.0 to < 11.136.0.5 (custom)
WebPros / WP Squared
Default status: unaffected
- affected: 0 to < 11.136.1.7 (custom)
WebPros / WHM
Default status: affected
- affected: 11.40.0.0 to < 11.86.0.41 (custom)
- affected: 11.88.0.0 to < 11.94.0.28 (custom)
- affected: 11.96.0.0 to < 11.102.0.39 (custom)
- affected: 11.104.0.0 to < 11.110.0.97 (custom)
- affected: 11.112.0.0 to < 11.118.0.63 (custom)
- affected: 11.120.0.0 to < 11.124.0.35 (custom)
- affected: 11.126.0.0 to < 11.126.0.54 (custom)
- affected: 11.128.0.0 to < 11.130.0.19 (custom)
- affected: 11.132.0.0 to < 11.132.0.29 (custom)
- affected: 11.134.0.0 to < 11.134.0.20 (custom)
- affected: 11.136.0.0 to < 11.136.0.5 (custom)
Fixes and workarounds
No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.
Sources and related reporting
CVE Program record ↗ · Download tracked evidence as JSON
- https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026
- https://docs.cpanel.net/release-notes/release-notes
- https://docs.wpsquared.com/changelogs/versions/changelog/#13617
- https://www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026
- https://www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flow
- https://github.com/watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.py
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-41940
- https://www.bleepingcomputer.com/news/security/critrical-cpanel-flaw-mass-exploited-in-sorry-ransomware-attacks/
- https://labs.watchtowr.com/the-internet-is-falling-down-falling-down-falling-down-cpanel-whm-authentication-bypass-cve-2026-41940/
Observed change timeline
History begins when Egret first downloads each source. It is not the complete upstream CVE history.
12 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-12",
"epss": 0.98527,
"percentile": 0.99922
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.98527,
"percentile": 0.99921
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.98527,
"percentile": 0.99921
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.98527,
"percentile": 0.99921
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.98527,
"percentile": 0.99921
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.98527,
"percentile": 0.99921
}06 Nov 2026, 06:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.98527,
"percentile": 0.99921
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.98527,
"percentile": 0.99921
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.98527,
"percentile": 0.99921
}03 Nov 2026, 12:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
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}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.98527,
"percentile": 0.99921
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2026-41940",
"cwes": [
"CWE-306"
],
"dateAdded": "2026-04-30",
"dueDate": "2026-05-03",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Known",
"notes": "https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026 ; https://docs.cpanel.net/release-notes/release-notes/ ; https://docs.wpsquared.com/changelogs/versions/changelog/#13617 ; https://nvd.nist.gov/vuln/detail/CVE-2026-41940\"",
"product": "cPanel & WHM and WP2 (WordPress Squared)",
"requiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
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