CVE-2025-27026 Improper Access Control Granularity impacting Infinera G42
An authenticated administrator can inadvertently disable all management interfaces, including the WebGUI and CLI, leading to a complete loss of device control.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-27026?
CVE-2025-27026 is a medium-severity missing authorization vulnerability in Infinera G42, published on 2 Jul 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A missing double-check feature in the WebGUI for CLI deactivation in Infinera G42 version R6.1.3 allows an authenticated administrator to make other management interfaces unavailable via local and network interfaces. The CLI deactivation via the WebGUI does not only stop CLI interface but deactivates also Linux Shell, WebGUI and Physical Serial Console access. No confirmation is asked at deactivation time. Loosing access to these services device administrators are at risk of completely loosing device control.
Weakness: CWE-1220
Which versions are affected by CVE-2025-27026?
It affects 1 product.
Products include Nokia G42 Firmware.
How do I fix CVE-2025-27026?
No fix has been published for CVE-2025-27026 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-27026 being exploited?
There is no known exploitation of CVE-2025-27026 in the wild and no public exploit code.
Other vulnerabilities in Infinera G42
Sources
Also known as GHSA-q3gw-3m7f-273f.