PatchTheCVECVE-2026-2402: CWE-307 Improper Restriction of Excessive Authentication Attempts vulnerability exists that would allow an att
CVE-2026-2402 is a medium-severity flaw (CVSS 5.3) affecting powerchute serial shutdown. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
CWE-307 Improper Restriction of Excessive Authentication Attempts vulnerability exists that would allow an attacker to gain access to the user account by performing an arbitrary number of authentication attempts with different credentials on a sequence of requests to multiple endpoints.
Why this priority
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 80%) |
| CISA exploited list | No |
| Weakness | CWE-307 |
| Published | 2026-04-14 |
| Last modified | 2026-10-26 |
Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-2402?
powerchute serial shutdown: upgrade to 1.5. Exact commands for each OS are on this page.
Is CVE-2026-2402 being exploited?
CVE-2026-2402 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-2402 affect?
CVE-2026-2402 affects powerchute serial shutdown. Severity is medium (CVSS 5.3). CWE-307 Improper Restriction of Excessive Authentication Attempts vulnerability exists that would allow an attacker to gain access to the user account by performing an arbitrary number of authentication attempts with different credentials o
How urgent is CVE-2026-2402?
Priority 28/100. Remotely exploitable, no login, no user action
Software pages
Schneider Electric vulnerabilities
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