CVE-2026-5787, Ivanti EPMM improper certificate validation (pre-auth Sentry impersonation, CVSS 9.1)
Analysis
EPMM's internal PKI issues CA-signed certificates to registered Sentry gateway hosts upon verified registration. CVE-2026-5787 (CWE-295) is a failure in that verification: an attacker submits a crafted registration request and EPMM issues a valid CA-signed certificate without confirming prior registration. The certificate carries Sentry-level trust and satisfies EPMM's administrative authentication gate, enabling the CVE-2026-6973 chain. No workaround fully mitigates CVE-2026-5787 in isolation; patching is required. Affected: all on-prem EPMM < 12.6.1.1 / 12.7.0.1 / 12.8.0.1.
Cited evidence
EPMM's internal PKI issues CA-signed certificates to registered Sentry gateway hosts upon verified registration.
Updates1
NCSC Switzerland updated its Ivanti May 2026 advisory on 29 May 2026, adding CVE-2026-8992, a local privilege escalation in the Ivanti Secure Access Client (NCSC Switzerland Security Hub, 2026-05-29). CVSS 3.1 = 7.8 HIGH. A locally-authenticated attacker on a managed endpoint running the Ivanti SAC client can escalate from a standard Windows user session to local admin. Ivanti patched CVE-2026-8992 in all SAC client versions released on or after 12 May 2026. This is secondary to the actively-exploited CVE-2026-6973 (Ivanti EPMM admin-authenticated RCE, CISA KEV) which remains the highest-severity Ivanti item. Detection: Windows Event IDs 4672 and 4673 (special privilege assignment) correlated with Ivanti SAC process lineage (ivanti-vpn.exe, Ivanti Secure Access Client.exe). Hardening: update SAC client to any release from 12 May 2026 or later via EPMM-managed software inventory.
Sources2
Revision history
- Published 2026-05-08-migrated
- Update 2026-05-30-aca445cc
UPDATE (originally covered 2026-05-08): NCSC Switzerland updated its Ivanti May 2026 advisory on 29 May 2026, adding CVE-2026-8992, a local privilege escalation in the Ivanti Secure Access Client (NCSC Switzerland Security Hub, 2026-05-29). CVSS 3.1 = 7.8 HIGH.
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