Quick answers
- Is CVE-2026-62647 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-62647 being exploited in the wild.
- How severe is CVE-2026-62647?
- High severity, with a CVSS score of 7.4, published 8 September 2026.
- Which products and versions are affected?
- Siemens Reyrolle 7SR5 All versions < V2.70.
- Is there a fix for CVE-2026-62647?
- 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-2026-62647 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-62647?
- 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-2026-62647 is an insufficient randomness vulnerability in the random number generator used to create session identifiers and other security-relevant values in Reyrolle 7SR5. The RNG is not initialized with a True Random Number Generator (TRNG), resulting in predictable sequences that can be derived or brute-forced by an unauthenticated remote attacker over the network. An attacker can predict session IDs and forge valid authentication tokens to gain unauthorized access to the device without needing legitimate credentials. The vulnerability affects all versions prior to V2.70, which includes the patch.
Affected products
- Siemens Reyrolle 7SR5 All versions < V2.70
Timeline
- 2026-09-08: disclosed
- 2026-09-08: patched: Update to V2.70 or later