Quick answers
- Is CVE-2026-62654 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-62654 being exploited in the wild.
- How severe is CVE-2026-62654?
- Medium severity, with a CVSS score of 6.8, published 8 September 2026.
- Which products and versions are affected?
- Siemens Reyrolle 7SR5 All versions < V2.70.
- Is there a fix for CVE-2026-62654?
- A patch was published on 2026-09-08: Update to V2.70 or later Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-62654 attacked?
- It is attacked with physical access, in a network appliance.
- Am I affected by CVE-2026-62654?
- Check whether you run Siemens Reyrolle 7SR5 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
CVE-2026-62654 is an insecure firmware update mechanism in the maintenance mode of Reyrolle 7SR5. The vulnerability is triggered by a physical key sequence during device boot that activates a special maintenance state. In this mode, the device fetches program code from a network server without cryptographic verification of authenticity or integrity. An attacker with physical access can exploit this to upload and execute arbitrary unsigned code with device privileges, compromising the relay's protective functions and potentially affecting substation operations. The fix is to update to version V2.70 or later.
Affected products
- Siemens Reyrolle 7SR5 All versions < V2.70
Timeline
- 2026-09-08: disclosed
- 2026-09-08: patched: Update to V2.70 or later