CVE-2026-66564 Critical · 9.8 EPSS 0.3%
Unauthenticated PHP Object Injection in ShiftCV <= 3.0.14 versions.
ThemeREX · ShiftCV
Summary
The flaw is an unauthenticated PHP object injection vulnerability in the ShiftCV product from ThemeREX, affecting versions up to and including 3.0.14, where untrusted data is deserialized. An attacker with network access can exploit it without authentication or user interaction, and the attack requires no special configuration or conditions beyond reaching the vulnerable component.
Heading is the official description · NVD
Priority scorePatchfirst’s 0 to 100 ranking. It adds points for CISA KEV listing, ransomware use, EPSS, threat reports, public exploit code and CVSS. Every CVE page shows the breakdown. Breakdown
11.5 / 100
- Exploited
- Not confirmed
- Reports
- 0
- Tactics
- 0/15
Exploitation timelineDated milestones for a CVE: when it was disclosed, when exploit code became public, when exploitation was confirmed, and when threat reports named it.
Disclosed on 10 Oct 2026. No public exploit code or confirmed exploitation is recorded.
MITRE ATT&CKA public catalogue of the techniques attackers use, maintained by MITRE. Patchfirst uses it to describe what attackers do with a vulnerability. techniques
No techniques linkedNo ATT&CK techniques are linked to this CVE yet. MITRE CTID has not mapped it, and no report passage in the corpus ties it to a technique.