TLS Certificate Validation Bypass in Altium Designer 24.9.0 Enables MITM Attack

Publication date: 2026-01-22

Last updated on: 2026-02-26

Assigner: Altium

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-01-22

Last Modified

2026-02-26

Generated

2026-07-06

AI Q&A

2026-01-22

EPSS Evaluated

2026-07-05

NVD

CVE-2025-27377

EUVD

EUVD-2026-4175

Affected Vendors & Products

Vendor	Product	Version / Range
altium	designer	From 24.9.0 (inc) to 25.2.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-295	The product does not validate, or incorrectly validates, a certificate.

Attack-Flow Graph

Executive Summary

This vulnerability in Altium Designer version 24.9.0 occurs because the software does not validate self-signed server certificates for cloud connections. This means an attacker who can perform a man-in-the-middle (MITM) attack could intercept or manipulate the network traffic between the user and the cloud service.

Impact Analysis

The vulnerability could allow an attacker to intercept or manipulate network traffic, potentially exposing authentication credentials or sensitive design data to unauthorized parties.

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