PT-2025-1166 · Microsoft · Windows

Yuki Chen · Published 2025-01-14 · Updated 2025-09-17 · CVE-2025-21295

Positive Technologies · (AI Summary)

CVSS v3.1

8.1

High

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Windows (affected versions not specified)

Description The issue is related to a remote code execution vulnerability in the SPNEGO Extended Negotiation (NEGOEX) security mechanism. It is associated with the use of memory after it has been freed, which can be exploited by a remote attacker to execute arbitrary code.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

BDU:2025-00447

CVE-2025-21295

Affected Products

Windows

References · 10

• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-21295 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-00447 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-21295 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/716902 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21295 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-21295 · Security Note
• https://osv.dev/vulnerability/CVE-2025-21295 · Vendor Advisory
• https://twitter.com/dailycve/status/1968435340927983723 · Twitter Post
• https://t.me/avleonovcom/1497 · Telegram Post
• https://t.me/echeloneyes/3545 · Telegram Post