CVE-2026-104935: in the CISA KEV catalogue

Ivanti Connect Secure Authentication Bypass by Spoofing Vulnerability. CISA added CVE-2026-104935 to the Known Exploited Vulnerabilities catalogue on 2026-10-13 with a default due date of 2026-10-16. Known ransomware campaign use: Unknown. Forensic triage flag: Yes.

Ivanti Connect Secure contains an authentication bypass by spoofing vulnerability that allows a remote unauthenticated attacker to execute arbitrary commands. (CISA description)

Vendor / product: Ivanti Connect Secure
CWE: CWE-290
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: 89%, percentile 99 (scored 2026-11-03)

EPSS puts about 89 in 100 odds (89%) 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)

https://nvd.nist.gov/vuln/detail/CVE-2026-104935

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-2026-104935 in the CISA KEV catalogue?

Yes. CISA added CVE-2026-104935 (Ivanti Connect Secure Authentication Bypass by Spoofing Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2026-10-13. CISA's default due date for it is 2026-10-16.

Is CVE-2026-104935 used in ransomware attacks?

CISA marks known ransomware campaign use as Unknown for CVE-2026-104935. That means CISA lacks confirmation, not that ransomware groups do not use it.

What should I do about CVE-2026-104935?

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-2026-104935