Is CVE-2025-27377 actively exploited?

No active exploitation of CVE-2025-27377 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-27377 be exploited remotely?

Yes. CVE-2025-27377 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-27377?

CVE-2025-27377 has a CVSS score of 5.3 (MEDIUM).

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MEDIUM

CVE-2025-27377

CWE-295Published: January 22, 2026· Updated: Jun 17, 2026

5.3

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2025-27377 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 5.3.