CVE-2026-66564: CWE-502 Deserialization of Untrusted Data in ThemeREX ShiftCV
Description
CVE-2026-66564 is a critical unauthenticated PHP Object Injection vulnerability in ThemeREX ShiftCV versions up to 3.0.14. This vulnerability allows remote attackers to perform deserialization of untrusted data without authentication, potentially leading to full system compromise.
CVSS v3.1
Score 9.8critical
Affected software
ThemeREX
ShiftCV
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-66564) affects ThemeREX ShiftCV versions up to and including 3.0.14. It is a PHP Object Injection flaw caused by unsafe deserialization of untrusted data, classified under CWE-502. The vulnerability is exploitable without authentication, allowing an attacker to execute arbitrary code, resulting in complete confidentiality, integrity, and availability impact. The CVSS v3.1 base score is 9.8, indicating critical severity with network attack vector, low attack complexity, no privileges required, and no user interaction needed.
Potential Impact
Successful exploitation can lead to full system compromise, including remote code execution, data disclosure, and denial of service. The vulnerability affects confidentiality, integrity, and availability at the highest level.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Until a patch is available, restrict access to vulnerable installations and monitor for suspicious activity related to PHP object injection attempts.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Patchstack
- Date Reserved
- 2026-07-27T13:59:48.657Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aca96c12cdf04f6564a6048
Added to database: 10/10/2026, 19:49:21 UTC
Last enriched: 10/10/2026, 20:03:50 UTC
Last updated: 10/10/2026, 20:28:08 UTC
Views: 7
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