Signal is active with 2 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
Use after free in Windows Cluster Client Failover allows an authorized attacker to elevate privileges locally.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
If you run products in this scope, you should treat this CVE as relevant to your environment.
CVE-2026-21251 Use after free in Windows Cluster Client Failover allows an authorized attacker to elevate privileges locally. https://www.cve.org/CVERecord?id=CVE-2026-21251
Post summary
The text announces CVE-2026-21251, a use‑after‑free vulnerability in Windows Cluster Client Failover that permits local privilege escalation by authorized attackers. No PoC, exploit code, or patch information is provided.
A new vulnerability with increased severity was disclosed for Microsoft Windows (CVE-2026-21251) https://vuldb.com/?id.345277
Post summary
Microsoft Windows vulnerability CVE-2026-21251 has been disclosed with increased severity; additional information can be found at the provided VulDB link.
5 of 5 entries
| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| OS | microsoft | windows_server_2016 | - | - | - |
| OS | microsoft | windows_server_2019 | - | - | - |
| OS | microsoft | windows_server_2022 | - | - | - |
| OS | microsoft | windows_server_2022_23h2 | - | - | - |
| OS | microsoft | windows_server_2025 | - | - | - |