What’s Vulnerable › Vulnerabilities
CVE-2025-27377: Missing Validation of Self-Signed Certificates in Altium Designer Allows Man-in-the-Middle Attacks
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-01-22 · updated 2026-06-17
- Weakness: CWE-295
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.
Affected products
- Altium Designer: from 24.9.0 before 25.2.0 — fixed in 25.2.0
How to fix
Upgrade to a fixed version: Altium Designer 25.2.0. Check the vendor advisory for mitigations.
References
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