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CVE-2026-77877: Control Web Panel (CWP) Missing Authentication Vulnerability

CVE-2026-77877 explained: high Missing Authentication in Control Web Panel (CWP). CVSS 8.6. Affected versions, detection, fixes and CTEM priority.

Last updated: Nov 2, 2026

CVSS
8.6 HIGH
EPSS
n/a
CISA KEV
Not listed
CWE
CWE-306

Sources: National Vulnerability Database, CVE.org, CISA KEV, FIRST EPSS

CVE-2026-77877 Overview

Control Web Panel (CWP) before webpanel_version 1.30 contains a missing authentication vulnerability that allows attackers able to reach the loopback API service to invoke root-privileged API routes without presenting an access token. Attackers can access endpoints such as /v1/restoredatabase/, /generaluser/, /last_access/, /valid_user/, /valid_token/, and /user_panel_dashboard/ to perform unauthorized actions with root privileges.

Critical Impact

Local or adjacent, unauthenticated attackers can exploit this Missing Authentication in Control Web Panel (CWP). The CVSS base score is 8.6 (High).

Affected Products

  • Control Web Panel (CWP): see the vendor advisory for the exact affected versions

Discovery Timeline

  • 2026-11-02: CVE-2026-77877 published to the National Vulnerability Database by disclosure@vulncheck.com
  • 2026-11-02: last updated in the NVD database

Technical Details for CVE-2026-77877

Vulnerability Analysis

CVE-2026-77877 is a Missing Authentication weakness (CWE-306: Missing Authentication) in Control Web Panel (CWP). Based on its CVSS vector, the flaw needs local or adjacent access, needs no login, and needs no user interaction. A critical function can be used without logging in.

With a CVSS base score of 8.6, apply the vendor fix and confirm exposure on internet facing and business critical assets first.

Root Cause

The weakness is classified as CWE-306: Missing Authentication. A critical function can be used without logging in.

Attack Vector

Based on the CVSS vector, the flaw needs local or adjacent access, needs no login, and needs no user interaction. Attack complexity is low complexity.

No exploitation in the wild is confirmed by CISA at the time of the last update. Check the references below for any vendor or researcher proof of concept.

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Detection Methods for CVE-2026-77877

Detection Strategies

  • Inventory every instance of Control Web Panel (CWP) and compare the running version with the affected range above.
  • Check external attack surface scans for internet facing instances of the component.
  • Run an authenticated vulnerability scan once your scanner ships a check for this CVE.

Monitoring Recommendations

  • Forward Control Web Panel (CWP) application, access and audit logs to your SIEM for retrospective hunting.
  • Alert on new processes, configuration changes or outbound connections from the affected service.
  • Track the vendor advisory and the CISA KEV catalog for changes in exploitation status.

How to Mitigate CVE-2026-77877

Immediate Actions Required

  • Apply the fixed version of Control Web Panel (CWP) named in the vendor advisory.
  • Prioritize internet facing and business critical instances first.
  • Rescan after the change to confirm the exposure is closed.

Patch Information

Use the fixed version listed in the vendor advisory for Control Web Panel (CWP).

Workarounds

  • If patching must wait, restrict network access to the affected service and place it behind authentication or a web application firewall rule.

CWE References

Technical References

This entry is built directly from NVD, CISA KEV and EPSS data. Verify fixed versions in the vendor advisory before you deploy.

Frequently asked questions

CVE-2026-77877 is a high severity Missing Authentication in Control Web Panel (CWP) with a CVSS score of 8.6. Apply the vendor fix and confirm exposure on internet facing and business critical assets first.

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