CVE-2026-45206: Privilege Escalation in Apex One/SEP Agent

The National Vulnerability Database has disclosed CVE-2026-45206, an origin validation vulnerability affecting the Apex One and SEP (Symantec Endpoint Protection) agents. This flaw, rated with a CVSS score of 7.8 (HIGH), allows a local attacker to escalate privileges on compromised systems. It shares similarities with CVE-2026-45207 but exploits a different inter-process communication mechanism within the agent’s protection architecture.

Exploitation requires an attacker to first achieve low-privileged code execution on the target system. This means the vulnerability isn’t a direct entry point but rather a critical post-exploitation primitive. Once an attacker has a foothold, this CVE provides a clear path to elevate privileges, granting them deeper control over the endpoint.

For defenders, this is a clear signal to prioritize robust endpoint detection and response (EDR) capabilities. While the vulnerability requires initial access, its high severity means it will be a prime target for threat actors looking to move laterally and gain persistence. Patching is paramount once updates are available, but a defense-in-depth strategy is essential to prevent that initial low-privileged access.