CVE-2026-118527: in the CISA KEV catalogue
Ivanti Connect Secure Generation of Predictable Numbers or Identifiers Vulnerability. CISA added CVE-2026-118527 to the Known Exploited Vulnerabilities catalogue on 2026-10-30 with a default due date of 2026-11-13. Known ransomware campaign use: Unknown. Forensic triage flag: No.
Ivanti Connect Secure contains a generation of predictable numbers or identifiers vulnerability that allows a remote authenticated attacker to upload files with attacker-controlled content to a known location on disk. This vulnerability can be chained with CVE-2026-104935 and CVE-2026-111357. (CISA description)
- Vendor / product
- Ivanti Connect Secure
- CWE
- CWE-340
- CISA required action
- 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.
- EPSS
- Not scored
Vendor and reference links (from CISA)
- https://hub.ivanti.com/s/article/Security-Advisory-Ivanti-Connect-Secure-CVE-2026-104935?language=en_US
- https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
- https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk
- https://nvd.nist.gov/vuln/detail/CVE-2026-118527
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2026-118527 in the CISA KEV catalogue?
Yes. CISA added CVE-2026-118527 (Ivanti Connect Secure Generation of Predictable Numbers or Identifiers Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2026-10-30. CISA's default due date for it is 2026-11-13.
Is CVE-2026-118527 used in ransomware attacks?
CISA marks known ransomware campaign use as Unknown for CVE-2026-118527. That means CISA lacks confirmation, not that ransomware groups do not use it.
What should I do about CVE-2026-118527?
CISA's required action: 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.
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-2026-118527