CVE-2026-83649
MediumCVSS 6.5Exploitation Probability (EPSS)
Elevated risk65th percentile - higher than 65% of all known CVEs
Summary
Out-of-bounds read vulnerability in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to deny service over a network.
Risk Assessment
An attacker could cause the security service to crash, potentially disrupting authentication and authorization.
Recommendation
Apply security patches for LSASS from Microsoft.
Other vulnerabilities in Windows Local Security Authority Subsystem Service (LSASS)
See all- CVE-2026-96219Critical
An out-of-bounds write in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to execute code over a network. The flaw occurs when data is written outside the allocated memory area.
- CVE-2026-20875High
Null pointer dereference in Windows Local Security Authority Subsystem Service (LSASS) allows an unauthorized attacker to deny service over a network.
- CVE-2026-20854High
Use after free in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to execute code over a network.
- CVE-2025-53809Medium
Improper input validation in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to deny service over a network.
Original NVD description (English source)
Out-of-bounds read in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to deny service over a network.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS