SEPTEMBER 17, 2026
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Case File

CVE-2026-91926

LOW · CVSS 3.7 EPSS 0.23% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-15 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

A memory leak vulnerability exists in the NTLM target-info parser of gss-ntlmssp, triggered by crafted NTLM CHALLENGE messages containing duplicated AV_PAIR entries. This flaw allows a malicious actor to exploit the memory allocation process, potentially leading to gradual memory exhaustion on the client and resulting in a denial of service during NTLM authentication. Organizations utilizing NTLM authentication should prioritize addressing this vulnerability to mitigate potential service disruptions.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-91926
Severity
LOW
CVSS
3.7
EPSS
0.23%

Original NVD Description

A flaw was found in gss-ntlmssp. A memory leak occurs in the NTLM target-info parser when a crafted NTLM CHALLENGE message contains duplicated string-valued AV_PAIR entries. The parser allocates memory for each string value but does not free the previous allocation when the same AV_PAIR type appears more than once, leaking the earlier allocation. A malicious or man-in-the-middle server can exploit this to cause gradual memory exhaustion on the client during NTLM authentication, leading to a denial of service.