CVE-2025-27377 json
Missing Validation of Self-Signed Certificates in Altium Designer Allows Man-in-the-Middle Attacks
published 9mo ago modified 4mo ago also EUVD-2026-4175
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 8%
- public exploits
- 0
- none known
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.
Patch / fix
- Altium Altium Designer 25.2
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 9mo ago
Exploit prediction
0.19% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N |
Affected products
- Altium Altium Designer
Classification
- Weakness
-
- CWE-295 Improper Certificate Validation
References
-
altium.com
/platform/security-compliance/security-advisories
vendor-advisory
Sources
- CVE List CVE-2025-27377
- NVD CVE-2025-27377
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