CVE intelligence

CVE-2026-66837

Vulnerability intelligence

Published Oct 2, 2026Sources checked Oct 7, 2026

8.7HIGHCVSS out of 10

What this means

Review the available evidence

CVE-2026-66837 and is rated High severity with a CVSS score of 8.7. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

Vendor revision: Oct 7, 2026

Release Notes

CISA KEVNot listedBased on the latest collected catalog

EPSS0.3%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-66837?

Stack-based Buffer Overflow, Integer Overflow or Wraparound vulnerability in Apache Thrift php bindings. This issue affects Apache Thrift: before 0.25.0. Users are recommended to upgrade to version 0.25.0, which fixes the issue.

Source: NVD