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CVE-2025-27377— Missing Validation of Self-Signed Certificates in Altium Designer Allows Man-in-the-Middle Attacks

Quick assessment

Affected
Altium Altium Designer
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Altium Designer是美国Altium公司的一个电子设计自动化软件。 Altium Designer 24.9.0版本存在安全漏洞，该漏洞源于未验证云连接的自签名服务器证书，可能导致中间人攻击拦截或操纵网络流量。

CVSS 5.3 · Medium EPSS 0.19% · P8
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I. Basic Information for CVE-2025-27377

Vulnerability Information
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Vulnerability Title
Missing Validation of Self-Signed Certificates in Altium Designer Allows Man-in-the-Middle Attacks
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Altium Designer 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Altium Designer是美国Altium公司的一个电子设计自动化软件。 Altium Designer 24.9.0版本存在安全漏洞，该漏洞源于未验证云连接的自签名服务器证书，可能导致中间人攻击拦截或操纵网络流量。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Altium Altium Designer 24.9 ~ 25.1 -

II. Public POCs for CVE-2025-27377

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III. Intelligence Information for CVE-2025-27377

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Same Patch Batch · Altium · 2026-01-22 · 4 CVEs total

CVE-2025-27378 8.6 HIGH SQL Injection in AES Due to Inactive SQL Parsing Configuration
CVE-2025-27380 7.6 HIGH HTML Injection Leading to Script Execution in Altium Enterprise Server
CVE-2025-27379 6.8 MEDIUM Stored Cross-Site Scripting in AES BOM Viewer

IV. Related Vulnerabilities

Same vendor: Altium
Same weakness: CWE-295

V. Comments for CVE-2025-27377

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