Cyber Resilience

CVE-2026-22475

CriticalRCE

Published: 05 March 2026

Published
05 March 2026
Modified
22 April 2026
KEV Added
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Patch
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CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0039 30.7th percentile
Risk Priority 70 floored blend · peak EPSS

Summary

CVE-2026-22475 is a critical-severity Deserialization of Untrusted Data (CWE-502) vulnerability. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 30.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Deeper analysis

CVE-2026-22475 is a Deserialization of Untrusted Data vulnerability (CWE-502) in the axiomthemes Estate WordPress theme, enabling Object Injection. This issue affects the Estate theme from unknown initial versions through version 1.3.4 inclusive. Published on 2026-03-05T06:16:21.163, it carries a CVSS v3.1 base score of 9.8 (Critical), reflecting its network accessibility, low attack complexity, lack of required privileges or user interaction, and high impacts on confidentiality, integrity, and availability.

The vulnerability allows exploitation by unauthenticated remote attackers with no privileges or user interaction needed. Attackers can leverage the deserialization flaw to inject malicious objects, potentially leading to the high confidentiality, integrity, and availability impacts indicated by the CVSS score.

Patchstack's advisory documents this as a PHP Object Injection vulnerability specifically in the WordPress Estate theme version 1.3.4, providing details via their vulnerability database entry at https://patchstack.com/database/Wordpress/Theme/estate/vulnerability/wordpress-estate-theme-1-3-4-php-object-injection-vulnerability?_s_id=cve.

OWASP Top 10 for Web (2025)

A08:2025 Software or Data Integrity Failures

EU & UK References

Vulnerability details

Deserialization of Untrusted Data vulnerability in axiomthemes Estate estate allows Object Injection.This issue affects Estate: from n/a through <= 1.3.4.

CWE(s)
CWE-502

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Why these techniques?

Direct remote exploitation of public-facing WordPress theme via unauthenticated PHP deserialization/object injection leading to RCE.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2025-62368Shared CWE-502
CVE-2025-68903Shared CWE-502
CVE-2025-67911Shared CWE-502
CVE-2025-54014Shared CWE-502
CVE-2026-22505Shared CWE-502
CVE-2025-53078Shared CWE-502
CVE-2026-43633Shared CWE-502
CVE-2025-60039Shared CWE-502
CVE-2026-25429Shared CWE-502
CVE-2025-7697Shared CWE-502

Affected Assets

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-2 Flaw Remediation good match
prevent

Directly requires identification, reporting, and correction of the deserialization flaw in the Estate WordPress theme to prevent object injection exploitation.

SI-10 Information Input Validation good match
prevent

Mandates validation of untrusted inputs prior to deserialization, comprehensively addressing the root cause of CWE-502 object injection in the vulnerable theme.

RA-5 Vulnerability Monitoring and Scanning partial match
detect

Enables regular vulnerability scanning to identify the deserialization vulnerability in the Estate theme, facilitating timely remediation.

References