CVE-2026-67599Public exploitNetwork attack vector

Root command execution via unsanitized Log Viewer filter

Published Aug 3, 2026 · Updated Aug 3, 2026

OS command injection in ClearOS 7.9 Log Viewer allows remote authenticated users to execute arbitrary commands through its filter parameter. File.php interpolates the unsanitized filter value directly into a shell command, so command-substitution syntax executes as the webconfig user. Access to the Reports interface is required; default NOPASSWD sudo rules then permit immediate root command execution.

CVSS severity8.6
High
EPSS probability1.86%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in ClearOS 7.9 Log Viewer allows remote authenticated users to execute arbitrary commands through its filter parameter. File.php interpolates the unsanitized filter value directly into a shell command, so command-substitution syntax executes as the webconfig user. Access to the Reports interface is required; default NOPASSWD sudo rules then permit immediate root command execution.

The record

CVE
CVE-2026-67599
Published
Aug 3, 2026
Updated
Aug 3, 2026
Vendor
ClearFoundation
Product
ClearOS
Classifications
CWE-78, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=7.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ClearFoundation · ClearOSversion=7.9

Published CVSS scores

8.6VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.2NVDCVSS:3.1/AV:N/AC:L/PR:H/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

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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