CVE-2026-68820
Microsoft — Microsoft Windows Ancillary Function Driver for WinSock Use-After-Free Vulnerability
Microsoft · in CISA KEV since 2026-08-11
CISA federal deadline · Overdue by 58 daysCISA KEVActively Exploited
75
EVRS 75 of 100 Urgent
Patch This Cycle
Raised to the floor for a confirmed exploited vulnerability.
Why it scores 75
Evidence available: 6 of 8 signalsListed in the CISA KEV catalog, and an EPSS probability of 0.003.
- CISA KEVApplied
- RansomwareDid not apply
- Vendor exploitationDid not apply
- EPSSApplied
- Microsoft Exploitability IndexNo data
- Pre-patch disclosureNo data
- KEV recencyApplied
- CVSSApplied
The band answers “how soon”, not “how bad”. No data for: Microsoft Exploitability Index, Pre-patch disclosure. Why some signals show no data
Fix
No fixed version identified yetEvidence
Each value with its source| Measure | Value | Source |
|---|---|---|
| CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. | 7.0 | NVD |
| FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. | 0.003 (25.1st pctl) | FIRST EPSS |
| Actively exploitedWhether a source of record has confirmed attacks using it in the wild. | Confirmed | CISA KEV |
| Ransomware campaign useWhether CISA has seen ransomware operators use it. | Unknown or none | CISA KEV |
| CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. | 2026-08-25 · CISA federal deadline · Overdue by 58 days | CISA KEV |