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

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-19 · updated 2026-10-25
Weakness: CWE-200

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.

Affected products

Microchip GridTime 3000: from 1.0r0.03 before 1.2r0.0 — fixed in 1.2r0.0

How to fix

Upgrade to a fixed version: Microchip GridTime 3000 1.2r0.0. Check the vendor advisory for mitigations.

References

https://www.microchip.com/en-us/solutions/technologies/embedded-security/how-to-report-potential-product-security-vulnerabilities/gridtime-3000-gnss-time-server-access-token-exposure

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