CVE-2026-12620 Access Token Exposure in URL Parameters in GridTime™ 3000 GNSS Time Server

Medium 4.6 Published 19 Jun 2026 Updated 29 Jun 2026

Attackers can steal access tokens from URL parameters to bypass authentication and access sensitive data on GridTime 3000 GNSS Time Servers.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-12620?

CVE-2026-12620 is a medium-severity vulnerability in Microchip GridTime 3000, published on 19 Jun 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

The GridTime 3000 GNSS Time Server leaks the access token in the URL parameters of some endpoints.

This issue affects GridTime 3000: from 1.0r0.03 through 1.1r0.0.

Weakness: CWE-200

Which versions are affected by CVE-2026-12620?

It affects 1 product.

Products include Microchip Gridtime 3000 Firmware.

How do I fix CVE-2026-12620?

No fix has been published for CVE-2026-12620 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-12620 being exploited?

There is no known exploitation of CVE-2026-12620 in the wild and no public exploit code.

Sources

Also known as GHSA-4766-4px9-j9m3.