CVE-2026-83709
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk23th percentile - higher than 23% of all known CVEs
Summary
A heap-based buffer overflow in Windows NTLM allows an authorized attacker to elevate privileges locally.
Risk Assessment
This flaw enables an attacker with valid credentials to escalate privileges, potentially compromising system and network security.
Recommendation
Immediately install security updates for Windows NTLM and consider restricting NTLM usage in the environment.
Other vulnerabilities in Windows NTLM
See all- CVE-2026-20925Medium
External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.
- CVE-2026-20872Medium
External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.
- CVE-2025-24054MediumActively exploited
A vulnerability in Windows NTLM allows external control of file name or path. An unauthorized attacker can perform spoofing over a network.
- CVE-2024-43451MediumActively exploited
NTLM Hash Disclosure Spoofing Vulnerability allows for the disclosure of NTLM hashes. An attacker could exploit this to impersonate a user or system.
- CVE-2026-50508Medium
A vulnerability in Windows NTLM exposes sensitive information to an unauthorized actor, allowing spoofing over a network.
Original NVD description (English source)
Heap-based buffer overflow in Windows NTLM allows an authorized attacker to elevate privileges locally.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS