# CVE-2026-81963: Microsoft Windows Link Following Vulnerability

- Exploited (CISA KEV): yes, added 2026-09-08
- Published: 2026-09-08
- CVSS: 7.8 HIGH (v3.1)
- EPSS: 0.4% (34th percentile)
- CWE: CWE-59, CWE-284

Improper link resolution before file access ('link following') in Windows Update Stack allows an authorized attacker to elevate privileges locally.

## Edge WAF coverage (claimed by vendors, not measured)

| Vendor | Status | First rule | Days after publication |
|---|---|---|---|
| Cloudflare | No public claim | — | — |
| AWS | No public claim | — | — |
| Microsoft Azure | No public claim | — | — |
| Google Cloud | No public claim | — | — |
| Fastly | Before feed history | — | — |
| F5 | No public claim | — | — |
| Akamai | No public source | — | — |
| OWASP CRS | No public claim | — | — |

"No public claim" means no vendor statement names this CVE; "Before feed history" means the CVE is older than the vendor feed. In both cases generic rules may still block it.

HTML: https://cve.vigilbase.com/cve/CVE-2026-81963 · JSON: https://cve.vigilbase.com/api/v1/cves/CVE-2026-81963