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PatchSiren cyber security CVE debrief

CVE-2026-34733 WWBN CVE debrief

A vulnerability was found in the AVideo installation script, specifically in the deleteSystemdPrivate.php file. The script's CLI-only access guard contains a PHP operator precedence bug, allowing the script to be accessed via HTTP without authentication. This could lead to the deletion of files from the server's temp directory and disclosure of the temp directory contents in the response. The vulnerability affects AVideo version 26.0 or prior. System administrators and users of AVideo should be aware of this vulnerability and take necessary actions to secure their installations.

Vendor
WWBN
Product
AVideo
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-03-31
Original CVE updated
2026-07-24
Advisory published
2026-03-31
Advisory updated
2026-07-24

Who should care

System administrators and users of AVideo, especially those using version 26.0 or prior, should be aware of this vulnerability and take necessary actions to secure their installations. This includes reviewing system logs, restricting access to the deleteSystemdPrivate.php script, and implementing additional security measures to prevent unauthorized access.

Technical summary

The AVideo installation script's deleteSystemdPrivate.php file contains a PHP operator precedence bug in its CLI-only access guard. The guard condition !php_sapi_name() === 'cli' never evaluates to true due to how PHP resolves operator precedence. This allows the script to be accessed via HTTP without authentication, leading to potential file deletion and disclosure of temp directory contents. The bug was introduced in version 26.0 and prior. The script is intended to run exclusively from the command line.

Defensive priority

Medium priority should be given to patching or mitigating this vulnerability, as it could lead to unauthorized access and potential data loss.

Recommended defensive actions

  • Apply the patch or upgrade to a version of AVideo that is not vulnerable.
  • Restrict access to the deleteSystemdPrivate.php script.
  • Monitor the server's temp directory for any suspicious activity.
  • Implement additional security measures to prevent unauthorized access.
  • Review system logs for evidence of exploitation.
  • Perform a thorough review of the AVideo installation and configuration.
  • Consider implementing compensating controls for exposed systems.

Evidence notes

The CVE record was published on 2026-03-31T21:16:32.083Z and last modified on 2026-07-24T20:10:00.147Z. The NVD entry is currently Analyzed. The vulnerability affects AVideo installations prior to version 26.0.1. Evidence of exploitation has not been reported. Defenders should verify AVideo installations and review system logs for suspicious activity related to the deleteSystemdPrivate.php script.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-34733 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-34733

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-34733 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-34733

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.