cve-2026-54987

The cve-2026-54987 tag covers Microsoft’s fix for an Important-rated Windows Overlay Filter elevation-of-privilege vulnerability. CVE-2026-54987 was addressed in the July 14, 2026 Windows security updates and has a CVSS 3.1 score of 7.8. The flaw represents a post-compromise risk: an attacker with limited local access could potentially use it to gain substantially greater control of a vulnerable Windows PC or server. Microsoft documented the issue in its Security Update Guide. At the time of release, the vulnerability was reported as neither publicly disclosed nor known to be exploited, making timely installation of the relevant July security updates an important defensive step for affected systems.