The remote Windows host is missing security update 5121000. It is, therefore, affected by multiple vulnerabilities

  - Use after free in Microsoft QUIC allows an unauthorized attacker to execute code over a network.
    (CVE-2026-62815)

  - Improper neutralization of special elements used in a command ('command injection') in Windows Active     Directory allows an unauthorized attacker to execute code over a network. (CVE-2026-49179)

  - Heap-based buffer overflow in Microsoft Local Security Authority Server (lsasrv) allows an authorized     attacker to execute code over a network. (CVE-2026-62784)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

Analytics

KB5121000: Windows 11 Version 26H1 Security Update (August 2026)

high Nessus Plugin ID 334603

Version 1.5