PT-2026-2688 · Microsoft · Windows Kernel+1

Published 2026-01-13 · Updated 2026-01-15 · CVE-2026-20838

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

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

Description The Windows Kernel has a flaw where the generation of error messages can expose sensitive information to a local attacker. This allows an attacker to potentially disclose information and impact the system.

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

Generation of Error Message Containing Sensitive Information

Weakness Enumeration

CWE-209

Related Identifiers

BDU:2026-00424

CVE-2026-20838

Affected Products

Windows

Windows Kernel

References · 7

• https://bdu.fstec.ru/vul/2026-00424 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20838 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-20838 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-20838 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-20838 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-20838 · Security Note
• https://twitter.com/CVEnew/status/2011759677197910454 · Twitter Post