RCE in Filerun
CVE-2026-73694
FileRun before 2026.3.0 contains an OS command injection vulnerability caused by a no-op redefinition of escapeshellcmd() in CLI.php that strips shell-metacharacter escaping, allowing attacker-controlled input to reach an exec() sink unsanitized. Attackers can exploit this through an interactive path via image_preview.php with a crafted args parameter requiring superuser authentication, or through a persistent path by storing malicious payloads in thumbnails_ffmpeg_args or thumbnails_ffmpeg_ss that execute when any user triggers video thumbnail generation.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.022 (82.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: 0.000
Affected products
Weakness classification (CWE)
References
- VulnCheck Blog (technical-description, exploit)
- Release Notes (release-notes, patch)
- www.vulncheck.com/advisories/filerun-os-command-injection-via-escapeshellcmd-no… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-73694?
- CVE-2026-73694 is a high-severity vulnerability in Filerun, classified under OS Command Injection. CVSS score: 7.2/10. Published 2026-09-10.
- How severe is CVE-2026-73694?
- High severity. CVSS v3 base score is 7.2 out of 10.