CVE-2026-12621 Cross-Site Scripting (XSS) Vulnerability in Password Reset Redirect in GridTime™ 3000 GNSS Time Server

Medium 5.3 Published 19 Jun 2026 Updated 29 Jun 2026

An attacker can inject malicious scripts into the GridTime 3000 password reset form, potentially compromising user sessions or executing code.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-12621?

CVE-2026-12621 is a medium-severity cross-site scripting vulnerability in Microchip GridTime 3000, published on 19 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Improper neutralization of input during web page generation XSS vulnerability in the GridTime 3000 (password reset form) allows XSS. This issue affects GridTime 3000: from 1.0r0.03 before 1.2r0.0.

Weakness: CWE-79

Which versions are affected by CVE-2026-12621?

It affects 1 product.

Products include Microchip Gridtime 3000 Firmware.

How do I fix CVE-2026-12621?

No fix has been published for CVE-2026-12621 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-12621 being exploited?

There is no known exploitation of CVE-2026-12621 in the wild and no public exploit code.

Sources

Also known as GHSA-pqrf-vgj8-cvrm.