CVE-2026-33277: An OS command Injection issue exists in LogonTracer prior to v2.0.0

Q: How do I fix CVE-2026-33277?

logontracer: upgrade to 2.0.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-33277 being exploited?

CVE-2026-33277 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-2026-33277 affect?

CVE-2026-33277 affects logontracer. Severity is high (CVSS 8.8). An OS command Injection issue exists in LogonTracer prior to v2.0.0. An arbitrary OS command may be executed by a logged-in user.

This month

HIGH 8.8UPGRADE

CVE-2026-33277 is a high-severity flaw (CVSS 8.8) affecting logontracer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An OS command Injection issue exists in LogonTracer prior to v2.0.0. An arbitrary OS command may be executed by a logged-in user.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.3% (top 29%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-04-27
Last modified	2026-10-26

Publisher (CNA): JPCERT/CC · Vendor: jpcert

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

Am I affected?

Timeline

2026-04-27 00:16 UTCPublished CVE record published
2026-10-26 00:10 UTCUpdated Record last modified

jpcert logontracer UPGRADE

Affected: < 2.0.0

Fixed in: 2.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy logontracer || rpm -q logontracer || logontracer --version

2. UPGRADE to 2.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade logontracer

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade logontracer

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-2026-33277?

logontracer: upgrade to 2.0.0. Exact commands for each OS are on this page.

Is CVE-2026-33277 being exploited?

CVE-2026-33277 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-2026-33277 affect?

CVE-2026-33277 affects logontracer. Severity is high (CVSS 8.8). An OS command Injection issue exists in LogonTracer prior to v2.0.0. An arbitrary OS command may be executed by a logged-in user.

How urgent is CVE-2026-33277?

Priority 48/100. High severity

References

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