CVE-2026-1603
Ivanti Endpoint Manager (EPM) Authentication Bypass Vulnerability
Ivanti Endpoint Manager (EPM)
An authentication bypass in Ivanti Endpoint Manager before version 2024 SU5 allows a remote unauthenticated attacker to leak specific stored credential data.
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 9 March 2026. US federal agencies were required to remediate it by 23 March 2026.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 88.3%, which is higher than 99.8% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Frequently asked questions
Is CVE-2026-1603 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2026-1603.
What does CVE-2026-1603 affect?
CVE-2026-1603 affects Ivanti Endpoint Manager (EPM). An authentication bypass in Ivanti Endpoint Manager before version 2024 SU5 allows a remote unauthenticated attacker to leak specific stored credential data.
How severe is CVE-2026-1603?
CVE-2026-1603 is rated HIGH with a CVSS base score of 8.6. EPSS puts the probability of exploitation in the next 30 days at 88.3%, higher than 99.8% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 23 March 2026.
How should organisations respond to CVE-2026-1603?
Apply the vendor patch for Ivanti Endpoint Manager (EPM) as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.