CVE-2026-66657
Unauthenticated Local File Inclusion in Biagiotti Core <=2.1.1
Is CVE-2026-66657 being exploited?
Not confirmed. CVE-2026-66657 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.34% probability of exploitation in the next 30 days.
How severe is CVE-2026-66657?
CVE-2026-66657 is rated High with a CVSS score of 8.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-66657?
Yes. A fix has been recorded for CVE-2026-66657. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-66657 affect?
CVE-2026-66657 affects Biagiotti Core <= 2.1.1, Websites using Biagiotti Core theme/module. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-66657?
Upgrade Biagiotti Core to patched version (>2.1.1); restrict file access and rotate exposed credentials.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attacker can include/read local files and potentially achieve code execution, leading to data theft, credential exposure, and full site compromise.
Immediate action required
- affected<= 2.1.1
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.