Exploited CVEs / CVE-2026-41940
CVE-2026-41940
WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted, and the vulnerability is known to be used in ransomware campaigns. Federal agencies were required to remediate by 2026-05-03 (that deadline has passed); treat that date as the outer bound for your own environment. Check the vendor security advisory for the fix.
Actively exploited WebPros cPanel & WHM and WP2 (WordPress Squared) vulnerability, Critical severity, CVSS 9.8. Added to the CISA KEV catalog 2026-04-30.
Senserva AI Opinion for CVE-2026-41940
This is an authentication bypass in the WebPros cPanel & WHM and WP2 (WordPress Squared) login flow, letting an unauthenticated remote attacker reach the control panel directly. Anyone running cPanel or WHM as a hosting or server admin is exposed, and because these panels sit at the front of shared hosting environments, a single compromise can cascade across every site on the box. It is confirmed exploited (CISA KEV, added 2026-04-30), tied to ransomware campaigns, and carries a 98 percent EPSS exploit probability, so treat this as active in the wild rather than theoretical.
Do this: Apply the WebPros patch for cPanel & WHM and WP2 immediately, and until then restrict WHM and cPanel login ports to trusted management IPs at the firewall.
AI-generated from public data, 2026-07-27. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2026-41940
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Updated August 15, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Full tracking and change history for CVE-2026-41940
- Published
- 2026-04-30
- Last revised
- 2026-04-30
- Changes tracked
- 1
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
Drawn by Senserva Vivid from the Senserva change record. Hover any point for its date and value.
- 2026-04-30 added to the CISA KEV catalog by CISA
- 2026-07-17 CVSS 0.0 to 9.8; EPSS first scored at 98.1%
- 2026-07-24 EPSS 98.1% to 96.5%
- 2026-07-27 EPSS 96.5% to 97.9%
Recorded by Senserva on the dates shown, from CISA KEV and FIRST EPSS. This is what moved and when, which neither the vendor advisory nor NVD publishes.
CISA required action
Federal (BOD 22-01) remediation due date: 2026-05-03 (past due).
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Official fix for CVE-2026-41940
Check the vendor's security advisory channel for the patched cPanel & WHM and WP2 (WordPress Squared) versions and workarounds.
Common questions about CVE-2026-41940
Is CVE-2026-41940 actively exploited?
Yes. CVE-2026-41940 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2026-04-30, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 98%. CISA also reports it is known to be used in ransomware campaigns.
What is the CISA deadline and required action for CVE-2026-41940?
CISA set the federal (BOD 22-01) remediation due date at 2026-05-03, which has passed; treat any unremediated system as overdue. The verbatim 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.
What fixes CVE-2026-41940?
Check the vendor's security advisory for the patched cPanel & WHM and WP2 (WordPress Squared) versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.
Can I ask my own AI about CVE-2026-41940?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2026-41940's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (5 AM and 3 PM US Central).
Scope and sources
- Authoritative references
Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.