CVE-2026-62645 Auth bypass in Reyrolle 7SR5
Attackers can bypass authentication on Siemens Reyrolle 7SR5 relays by predicting session IDs exposed via the web interface, gaining unauthorized access.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-62645?
CVE-2026-62645 is a critical authentication bypass vulnerability in Siemens Reyrolle 7SR5, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability has been identified in Reyrolle 7SR5 (All versions < V2.70). Information is exposed through the web interface that can be used to calculate the current and past session ID numbers. This could allow an attacker to bypass the authentication and gain unauthorized access to the device.
Weakness: CWE-306
Which versions are affected by CVE-2026-62645?
How do I fix CVE-2026-62645?
No fix has been published for CVE-2026-62645 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-62645 being exploited?
There is no known exploitation of CVE-2026-62645 in the wild and no public exploit code.
Sources
Also known as GHSA-fvvh-v2c5-rpg2.