PT-2026-40184 · Unknown+1 · Telnet Client+1

Published 2026-05-12 · Updated 2026-05-12 · CVE-2026-35423

Positive Technologies (AI Summary)

CVSS v2.0

6.4

Medium

Base vector

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

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

Description An out-of-bounds read allows an unauthorized attacker to disclose information over a network. This issue occurs within the legacy Telnet Client, leading to information disclosure.

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

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

BDU:2026-06730

CVE-2026-35423

Affected Products

Telnet Client

Windows

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-35423 · Security Note
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-35423 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2026-35423 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-35423 · Security Note
• https://bdu.fstec.ru/vul/2026-06730 · Security Note
• https://twitter.com/windowsforum/status/2054274682396856462 · Twitter Post