CVE-2026-42018

Actively exploited

• In the CISA exploited-vulnerabilities catalogue since Sep 11, 2026
• US federal agencies must remediate it by Sep 25, 2026 (BOD 22-01)
• First attack observed 28 days after disclosure

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Source: CISA KEV · Sep 11, 2026 Sep 10, 2026