Quick answers
- Is CVE-2026-13348 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-13348 being exploited in the wild.
- How severe is CVE-2026-13348?
- High severity, with a CVSS score of 5.3, published 1 September 2026.
- Which products and versions are affected?
- Schneider Electric PowerChute Serial Shutdown <=1.5, 1.6.
- Is there a fix for CVE-2026-13348?
- A patch was published on 2026-09-17: Version 1.6 released with fix Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-13348 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2026-13348?
- Check whether you run Schneider Electric PowerChute Serial Shutdown 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
The vulnerability is classified as CWE-307 (Improper Restriction of Excessive Authentication Attempts) and exists in PowerChute Serial Shutdown versions 1.5 and earlier. The flaw allows an attacker to conduct arbitrary brute-force authentication attempts against user accounts when redirect handling is disabled. The attack requires network access to the UPS management interface (CVSS attack vector: network) but no authentication or user interaction. An attacker can leverage this to bypass authentication and gain unauthorized access to the system, potentially disrupting operations or accessing sensitive system data. Schneider Electric released version 1.6 as a fix; the service automatically restarts upon installation with version confirmation available in Control Panel or the application's About page.
Affected products
- Schneider Electric PowerChute Serial Shutdown <=1.5, 1.6
Timeline
- 2026-09-17: disclosed: CISA advisory ICSA-26-260-07 published
- 2026-09-17: patched: Version 1.6 released with fix