Affects Reyrolle 7SR5 protective relays used in power/utility infrastructure; unauthenticated remote DoS against critical grid devices can disrupt operations and public services.
CVE-2026-62648
Unauthenticated HTTP URL length flaw in Reyrolle 7SR5 allows remote crash/reboot (DoS).
Is CVE-2026-62648 being exploited?
Not confirmed. CVE-2026-62648 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.33% probability of exploitation in the next 30 days.
How severe is CVE-2026-62648?
CVE-2026-62648 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-62648?
Yes. A fix has been recorded for CVE-2026-62648. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-62648 affect?
CVE-2026-62648 affects Siemens Reyrolle 7SR5 (< V2.70), Reyrolle 7SR5 relay protection devices. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-62648?
Upgrade to V2.70 ASAP; block/ACL HTTP to devices and segment networks.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated remote attacker can trigger out-of-bounds write via crafted HTTP URL, crashing/rebooting the relay and causing denial of service to protection systems.
Immediate action required
- affected< V2.70
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.