PT-2025-20974 · Unknown+1 · Web Threat Defense+1

Vladimir Lagunov · Published 2025-05-13 · Updated 2026-03-16 · CVE-2025-29971

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions: Web Threat Defense versions prior to May 2025 update

Description: The issue is an out-of-bounds read in Web Threat Defense (WTD.sys) that allows an unauthorized attacker to deny service over a network. This can be exploited by remote attackers to crash systems, posing a kernel-level denial-of-service threat.

Recommendations: For versions prior to the May 2025 update, apply the patch KB5058411 to resolve the issue. As a temporary workaround, consider restricting network access to minimize the risk of exploitation.

Fix

DoS

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

BDU:2025-05607

CVE-2025-29971

Affected Products

Web Threat Defense

Windows

References · 11

• https://safe-surf.ru/specialists/bulletins-nkcki/721006 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2025-29971 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29971 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-05607 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-29971 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-29971 · Security Note
• https://osv.dev/vulnerability/CVE-2025-29971 · Vendor Advisory
• https://reddit.com/r/bugbounty/comments/1nfuue9/need_advice_no_payment_for_4_months · Reddit Post
• https://twitter.com/CVEnew/status/1922339839757971817 · Twitter Post
• https://twitter.com/ZeroPathLabs/status/1922447305405284539 · Twitter Post
• https://t.me/CSIRT_italia/3260 · Telegram Post