CVE-2021-34455
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk37th percentile - higher than 37% of all known CVEs
Summary
Elevation of privilege vulnerability in Windows File History Service. An attacker could exploit it to gain elevated privileges.
Risk Assessment
Potential for privilege escalation and system takeover.
Recommendation
Apply security updates provided by the vendor.
Other vulnerabilities in Windows File History Service
See all- CVE-2026-72947Medium
Integer underflow (wrap or wraparound) in Windows File History Service allows an authorized attacker to elevate privileges locally.
- CVE-2026-71340High
Use after free in Windows File History Service allows an authorized attacker to elevate privileges locally.
- CVE-2026-68837High
A use-after-free vulnerability exists in Windows File History Service. This allows an authorized attacker to elevate privileges locally.
- CVE-2026-57091High
Stack-based buffer overflow in Windows File History Service allows an authorized attacker to elevate privileges locally.
Original NVD description (English source)
Windows File History Service Elevation of Privilege Vulnerability
Vulnerability data from NVD (NIST) · CISA KEV · EPSS