CVE-2026-20872
MediumCVSS 6.5Exploitation Probability (EPSS)
Very high risk97th percentile - higher than 97% of all known CVEs
Summary
External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.
Risk Assessment
An attacker can impersonate a trusted system or user, potentially leading to data theft, unauthorized access, and compromise of network communication integrity.
Recommendation
Install the latest Windows security updates that address this vulnerability in the NTLM component.
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-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-2026-83709High
A heap-based buffer overflow in Windows NTLM allows an authorized attacker to elevate privileges locally.
- CVE-2026-50508Medium
A vulnerability in Windows NTLM exposes sensitive information to an unauthorized actor, allowing spoofing over a network.
- CVE-2025-59284Low
Exposure of sensitive information to an unauthorized actor in Windows NTLM allows an unauthorized attacker to perform spoofing locally. The vulnerability affects the NTLM mechanism in Windows.
Original NVD description (English source)
External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS