CVE-2025-27377

Missing Validation of Self-Signed Certificates in Altium Designer Allows Man-in-the-Middle Attacks

Published Jan 22, 2026 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Description
Altium Designer version 24.9.0 does not validate self-signed server certificates for cloud connections. An attacker capable of performing a man-in-the-middle (MITM) attack could exploit this issue to intercept or manipulate network traffic, potentially exposing authentication credentials or sensitive design data.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:altium:designer:*:*:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Altium
Altium designer
Vendors & Products Altium
Altium designer
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Altium Designer version 24.9.0 does not validate self-signed server certificates for cloud connections. An attacker capable of performing a man-in-the-middle (MITM) attack could exploit this issue to intercept or manipulate network traffic, potentially exposing authentication credentials or sensitive design data.
Title Missing Validation of Self-Signed Certificates in Altium Designer Allows Man-in-the-Middle Attacks
Weaknesses CWE-295
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Altium
Published
Updated
Jan 22, 2026, 2:41 PM
Reserved
Feb 23, 2025, 9:02 PM
Status
Analyzed
Published
Jan 22, 2026, 1:15 AM
Modified
Jun 17, 2026, 9:03 AM