Threat intelligence

Zermatt <= 1.6.1 - Unauthenticated PHP Object Injection

CVE-2026-39545 · zermatt

Important: Seeing this vulnerability listed does not mean your website is affected. Exposure depends on whether you run Zermatt at a vulnerable version. How SiteRespond intelligence works

Vulnerability: Zermatt <= 1.6.1 - Unauthenticated PHP Object Injection
Affected software: zermatt(Theme)
Affected versions: ≤ 1.6.1
Authentication: Unauthenticated
Vulnerability type: Other
CVE: CVE-2026-39545
Published: 8 April 2026
CISA KEV: Not listed in CISA KEV at last catalog refresh
Impact: This advisory describes a other issue in the affected software. Review the source advisory and your installed version to assess exposure.
Source: Data imported from Wordfence Intelligence (advisory 8dee7376-0177-4b9d-88f6-d2df054aca65). Methodology and redistribution notes

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