CVE-2026-55579Public exploitNetwork attack vector

Unauthenticated administrator access via hardcoded default password

Published Jul 27, 2026 · Updated Jul 27, 2026

Hard-coded credentials in Pheditor 2.0.1 through 2.0.5 allow remote attackers to gain administrator access using the default password. The PASSWORD constant in pheditor.php stores the unsalted SHA-512 hash of admin, while login permits it indefinitely and only displays a warning. Default-configured deployments expose file editing, upload, and terminal functions, enabling arbitrary file reads and writes and command execution as the web server user.

CVSS severity9.8
Critical
EPSS probability0.60%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hard-coded credentials in Pheditor 2.0.1 through 2.0.5 allow remote attackers to gain administrator access using the default password. The PASSWORD constant in pheditor.php stores the unsalted SHA-512 hash of admin, while login permits it indefinitely and only displays a warning. Default-configured deployments expose file editing, upload, and terminal functions, enabling arbitrary file reads and writes and command execution as the web server user.

The record

CVE
CVE-2026-55579
Published
Jul 27, 2026
Updated
Jul 27, 2026
Vendor
Pheditor
Product
Pheditor
Classifications
CWE-798, T1078.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 2.0.1, < 2.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Pheditor · Pheditorversion=>= 2.0.1, < 2.0.6

Published CVSS scores

9.8GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-798Use of Hard-coded Credentials
T1078.001Default Accounts

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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