CVE-2025-53778
Published: 12 August 2025
Summary
CVE-2025-53778 is a high-severity Improper Authentication (CWE-287) vulnerability in Microsoft Windows Server 2008. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked in the top 22.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 CM-6 (Configuration Settings) and IA-2 (Identification and Authentication (Organizational Users)).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Requires timely identification, reporting, and correction of system flaws like the NTLM improper authentication vulnerability through vendor patches and updates.
Establishes secure configuration settings to disable or restrict use of the vulnerable NTLM protocol, aligning with provided mitigation scripts.
Mandates robust identification and authentication for organizational users over networks, directly countering the improper authentication in Windows NTLM.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Improper auth bypass in NTLM directly enables remote privilege escalation from low to high privileges on Windows systems.
NVD Description
Improper authentication in Windows NTLM allows an authorized attacker to elevate privileges over a network.
Deeper analysisAI
CVE-2025-53778 is an improper authentication vulnerability in the Windows NTLM authentication protocol, published on 2025-08-12. It affects Windows systems utilizing NTLM for network authentication and carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), mapped to CWE-287 (Improper Authentication). The flaw enables an authorized attacker to bypass authentication mechanisms and escalate privileges remotely over a network.
An attacker with low-level privileges (PR:L) on a network-connected system can exploit this vulnerability without user interaction or high complexity. Successful exploitation grants high-impact access to confidentiality, integrity, and availability, specifically allowing privilege escalation from an authorized but limited account to higher privileges, potentially leading to full system compromise.
Microsoft's Security Response Center (MSRC) provides an update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53778 detailing remediation steps. Vicarius offers community resources including a detection script (https://www.vicarius.io/vsociety/posts/cve-2025-53778-detection-script-improper-authentication-vulnerability-affecting-windows-ntlm) and a mitigation script (https://www.vicarius.io/vsociety/posts/cve-2025-53778-mitigation-script-improper-authentication-vulnerability-affecting-windows-ntlm) to identify and address the NTLM authentication weakness in affected Windows environments.
Details
- CWE(s)