What is CVE-2026-77876?

CVE-2026-77876 is a critical-severity vulnerability in Control Web Panel, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-11-02.

How severe is CVE-2026-77876?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Control Web Panel

CVE-2026-77876

Control Web Panel (CWP) before webpanel_version 1.16 contains an OS command injection vulnerability in the protected_directory user panel module that allows attackers to execute arbitrary commands by submitting unescaped input through the file POST parameter in the acc=deletedp action. Attackers can exploit this flaw, which passes attacker-controlled input directly into a shell_exec call, to achieve code execution in the user panel context.

Vulnerability class: Command Injection (OS Command Injection)

Published 2026-11-02 · last modified 2026-11-02.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Control Web Panel

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

VulnCheck Blog (technical-description, exploit)
control-webpanel.com/changelog (release-notes, patch)
www.vulncheck.com/advisories/control-web-panel-cwp-os-command-injection-via-pro… (third-party-advisory)

Frequently asked questions

What is CVE-2026-77876?: CVE-2026-77876 is a critical-severity vulnerability in Control Web Panel, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-11-02.
How severe is CVE-2026-77876?: Critical severity. CVSS v3 base score is 9.8 out of 10.