Security readout for executives and security teams
Plain-English summary
CVE-2026-28066 affects the ThemeREX Legrand WordPress theme through version 2.17. The issue may let an unauthenticated remote attacker include local files through unsafe PHP file handling. Successful exploitation could expose sensitive data or affect site integrity and availability. Public sources do not state active exploitation.
Executive priority
Treat this as a high-priority WordPress theme exposure check, especially for public-facing sites. There is no provided evidence of known active exploitation, but the potential business impact is high if a vulnerable site is reachable and exploitable.
Technical view
The CVE describes improper filename control in PHP include/require logic, mapped to CWE-98, resulting in PHP Local File Inclusion in Legrand <= 2.17. CVSS 3.1 is 8.1: network-accessible, unauthenticated, no user interaction, high complexity, with high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is likely limited to WordPress sites using the ThemeREX Legrand theme version 2.17 or earlier. Sites not using this theme are not indicated as affected. The provided affected-version metadata is sparse and somewhat inconsistent, so validate against vendor and Patchstack records.
Exploitation context
The CVSS vector indicates remote unauthenticated exploitation is possible, but attack complexity is high. The CVE is not listed as CISA KEV in the provided data, and no cited source confirms active exploitation. No exploit details should be assumed from the available sources.
Researcher notes
The source data contains wording ambiguity: CWE-98 and “PHP Remote File Inclusion” terminology appear alongside a Local File Inclusion description. The affected array is also limited, while the description states <=2.17. Use Patchstack and vendor data to confirm exact vulnerable and fixed versions.
Mitigation direction
- Inventory WordPress sites for the ThemeREX Legrand theme.
- Identify any Legrand installations at version 2.17 or earlier.
- Check ThemeREX and Patchstack for current remediation guidance.
- Apply the vendor-recommended update if available.
- Remove or replace the theme if no safe version is confirmed.
- Increase monitoring for suspicious requests to affected WordPress sites.
Validation and detection
- Confirm whether Legrand is installed on each WordPress site.
- Record the installed Legrand version for each instance.
- Compare findings against the CVE scope: versions through 2.17.
- Review Patchstack and vendor advisories for updated affected-version details.
- Review web logs for unusual requests targeting theme functionality.
- Document remediation status and remaining exceptions.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-98: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-28066 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H2.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.1HighVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion')
Improper Control of Filename for Include/Require Statement in PHP Program ('PHP Remote File Inclusion') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.