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CVE-2026-55579

CriticalPublished

Pheditor: Hardcoded default password 'admin' with no forced change enables full application compromise

Published: Jul 27, 2026
Updated: Jul 27, 2026
Assigning CNA: GitHub_M
Evidence observed: Aug 8, 2026

Primary CVSS

9.8/ 10Critical

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

0.6%

Low · next 30 days

Percentile: 47.2%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Pheditor is a single-file editor and file manager written in PHP. From version 2.0.1 to before version 2.0.6, Pheditor ships with a hardcoded default password admin (SHA-512 hash stored at pheditor.php:11). There is no mechanism to force a password change on first login. Any deployment using the default credentials grants an attacker full access to the file editor, file upload, and terminal features, enabling arbitrary file read/write and remote code execution. This issue has been patched in version 2.0.6.

Sources

CVE-2026-55579Exploit
CVE-2026-55579 – Unauthenticated RCE in Pheditor via hardcoded default password "admin". Full Python exploit with file upload & terminal execution. No dependencies.

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