How severe is CVE-2026-41940?

CVE-2026-41940 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-41940 being actively exploited?

Yes. CVE-2026-41940 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-04-30, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2026-41940?

CVE-2026-41940 primarily affects Cpanel. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-41940?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2026-41940 have an EU (EUVD) identifier?

Yes. CVE-2026-41940 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26246. It is also flagged as exploited in the EUVD (since 2026-04-30).

When was CVE-2026-41940 published?

CVE-2026-41940 was published on 2026-04-29 and last updated on 2026-06-17.

CVE-2026-41940

CVE-2026-41940 is a critical-severity vulnerability in Cpanel with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2026-04-30). The underlying weakness is classified as CWE-306.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.3
EPSS exploit prediction: 98% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2026-04-30)
EU (EUVD) id: EUVD-2026-26246
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2026-04-30)
Weakness: CWE-306
Affected product: Cpanel
Published: 2026-04-29
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2026-41940?: 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.
How severe is CVE-2026-41940?: CVE-2026-41940 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-41940 being actively exploited?: Yes. CVE-2026-41940 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-04-30, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2026-41940?: CVE-2026-41940 primarily affects Cpanel. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-41940?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2026-41940 have an EU (EUVD) identifier?: Yes. CVE-2026-41940 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26246. It is also flagged as exploited in the EUVD (since 2026-04-30).
When was CVE-2026-41940 published?: CVE-2026-41940 was published on 2026-04-29 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:*
cpe:2.3:a:cpanel:wp_squared:*:*:*:*:*:wordpress:*:*

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