CVE-2026-41940: in the CISA KEV catalogue

WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function Vulnerability. CISA added CVE-2026-41940 to the Known Exploited Vulnerabilities catalogue on 2026-04-30 with a default due date of 2026-05-03. Known ransomware campaign use: Known. Forensic triage flag: No.

WebPros cPanel & WHM (WebHost Manager) and WP2 (WordPress Squared) contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel. (CISA description)

Vendor / product: WebPros cPanel & WHM and WP2 (WordPress Squared)
CWE: CWE-306
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.
EPSS: 99%, percentile 99 (scored 2026-11-03)

EPSS puts about 99 in 100 odds (99%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 99% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.

Vendor and reference links (from CISA)

Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.

Data dates. CISA KEV catalogue version 2026.11.03, released 2026-11-03, 1,767 entries (checked 2026-11-03). EPSS model v2026.06.15, scored 2026-11-03, 399,388 CVEs. Sources: CISA and FIRST (EPSS by FIRST; scores generated by Empirical Security). Copied to our own database and refreshed automatically; if a refresh fails, the previous copy keeps serving with its own date.

Frequently asked questions

Is CVE-2026-41940 in the CISA KEV catalogue?

Yes. CISA added CVE-2026-41940 (WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2026-04-30. CISA's default due date for it is 2026-05-03.

Is CVE-2026-41940 used in ransomware attacks?

CISA marks known ransomware campaign use as Known for CVE-2026-41940.

What should I do about CVE-2026-41940?

CISA's 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.

Sources

CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
NVD record for CVE-2026-41940