CVE-2026-2404: CWE-116 Improper Encoding or Escaping of Output vulnerability exists that could cause log injection and forged

Q: How do I fix CVE-2026-2404?

powerchute serial shutdown: upgrade to 1.5. Exact commands for each OS are on this page.

Q: Is CVE-2026-2404 being exploited?

CVE-2026-2404 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-2404 affect?

CVE-2026-2404 affects powerchute serial shutdown. Severity is medium (CVSS 5.3). CWE-116 Improper Encoding or Escaping of Output vulnerability exists that could cause log injection and forged log when an attacker alters the POST /j_security check request payload.

Q: How urgent is CVE-2026-2404?

Priority 26/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-2404 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-116 Improper Encoding or Escaping of Output vulnerability exists that could cause log injection and forged log when an attacker alters the POST /j_security check request payload.

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	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-116
Published	2026-04-14
Last modified	2026-10-26

Publisher (CNA): Schneider Electric SE · Vendor: schneider-electric

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-14 16:16 UTCPublished CVE record published
2026-10-26 00:10 UTCUpdated Record last modified

schneider-electric powerchute serial shutdown UPGRADE

Affected: < 1.5

Fixed in: 1.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy powerchute-serial-shutdown || rpm -q powerchute-serial-shutdown || powerchute-serial-shutdown --version

2. UPGRADE to 1.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade powerchute-serial-shutdown

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade powerchute-serial-shutdown

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
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-2026-2404?

powerchute serial shutdown: upgrade to 1.5. Exact commands for each OS are on this page.

Is CVE-2026-2404 being exploited?

CVE-2026-2404 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-2026-2404 affect?

CVE-2026-2404 affects powerchute serial shutdown. Severity is medium (CVSS 5.3). CWE-116 Improper Encoding or Escaping of Output vulnerability exists that could cause log injection and forged log when an attacker alters the POST /j_security check request payload.

How urgent is CVE-2026-2404?

Priority 26/100. Remotely exploitable, no login, no user action

Software pages

Schneider Electric vulnerabilities

References

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