RCE in Usmannasir Cyberpanel
CVE-2026-71966
CyberPanel 2.4.3, fixed in commit eca0c3c, contains an authenticated command injection vulnerability in the remote backup transfer feature that allows authenticated attackers to execute arbitrary OS commands by controlling a remote server's API response. Attackers can inject malicious commands through a crafted directory name in the remote server's API response, which bypasses security middleware validation and is passed unsanitized to the OS command execution function.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.033 (87.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.021 · newest: 0.033 · change: +0.012
Affected products
- Usmannasir Cyberpanel — versions 0, eca0c3cbeb35af8eaae9fafb094e8ef3cd923643
Weakness classification (CWE)
References
- themcsam.github.io/posts/cyberpanel-2.4.3-vulnerabilties/ (technical-description, exploit)
- github.com/usmannasir/cyberpanel/commit/eca0c3cbeb35af8eaae9fafb094e8ef3cd923643 (patch)
- www.vulncheck.com/advisories/cyberpanel-authenticated-command-injection-via-sta… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-71966?
- CVE-2026-71966 is a high-severity vulnerability in Usmannasir Cyberpanel, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-08-10.
- How severe is CVE-2026-71966?
- High severity. CVSS v3 base score is 8.8 out of 10.