PT-2026-3884 · Altium · Altium Designer

Published 2026-01-22 · Updated 2026-02-26 · CVE-2025-27377

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Altium Designer version 24.9.0

Description Altium Designer does not validate self-signed server certificates for cloud connections. This could allow an attacker performing a man-in-the-middle (MITM) attack to intercept or manipulate network traffic, potentially exposing authentication credentials or sensitive design data. A man-in-the-middle (MITM) attack is a type of cyberattack where a malicious actor secretly intercepts and potentially alters communication between two parties who believe they are directly communicating with each other.

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

Improper Certificate Validation

Weakness Enumeration

CWE-295

Related Identifiers

CVE-2025-27377

Affected Products

Altium Designer

References · 8

• https://altium.com/platform/security-compliance/security-advisories · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-27377 · Security Note
• https://osv.dev/vulnerability/CVE-2025-27377 · Vendor Advisory
• https://twitter.com/CVEnew/status/2014153672381616579 · Twitter Post
• https://twitter.com/lsof/status/2014398945389109644 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2014166629047783490 · Twitter Post
• https://t.me/cveNotify/153374 · Telegram Post
• https://t.me/cveNotify/149498 · Telegram Post