CVE-2026-81757 HIGH

CVE-2026-81757: WordPress Rank Math SEO plugin <= 1.0.276 - Remote Code Execution (RCE) vulnerability

Vendor Rank Math Seo

Product Rank Math SEO

Weakness CWE-502 · Unsafe deserialization

Published August 28, 2026

Last update August 28, 2026

View on NVD All CVEs

CVSS base score

7.2/10

Attack vector Network

Attack complexity Low

Privileges required High

User interaction None

Confidentiality High

Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

Author Remote Code Execution (RCE) in Rank Math SEO <= 1.0.276 versions.

Explanation of Vulnerability in Simple Terms

02Summary

Rank Math SEO versions up to 1.0.276 contain a deserialization vulnerability that allows high-privilege users to execute arbitrary code on the site. An attacker with administrator or editor access can craft malicious serialized data to trigger unintended PHP execution. This affects confidentiality, integrity, and availability of the site.

What an attacker can do

03Attacker Capabilities

Run arbitrary PHP code on the site with the privileges of the WordPress user account.

Potential impact on your site

04Site Impact

A compromised admin or editor account can fully compromise your site, steal data, or inject malware.

Conditions required to exploit

05Prerequisites

Attacker must have high-level WordPress user access (administrator or editor role).

Key dates

06Disclosure timeline

August 28, 2026 CVE published

August 28, 2026 Record updated

External resources

07References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-81757 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/502.html AskarLabs — CWE-502 write-up Deserialization of Untrusted Data

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