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TI-2025-20219 Aliases CVE-2025-27377GHSA-xfvg-p8x9-f25q

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

Priority LOW 23CWE-295Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
Spoofing
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-295.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0019 8th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
AltiumAltium Designer24.9 – 25.1—No fix listedCNA
  • Altium Designer VendorAltium Affected 24.9 – 25.1 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:altium:designer:*:*:*:*:*:*:*:*24.9.0 to before 25.2.0VulnerableAltium
  • cpe:2.3:a:altium:designer:*:*:*:*:*:*:*:* Versions 24.9.0 to before 25.2.0 Vulnerable ·Altium

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-27377
  2. 2026-10-03 Alias added: GHSA-xfvg-p8x9-f25q

References

Advisory 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences