Published Aug 11, 2025Sources checked Nov 13, 2026
7.8HIGHCVSS out of 10
What this means
Review the available evidence
CVE-2025-8843 and is rated High severity with a CVSS score of 7.8. 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: Sep 28, 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-2025-8843?
A vulnerability was found in NASM Netwide Assember 2.17rc0. This affects the function macho_no_dead_strip of the file outmacho.c.
The manipulation leads to heap-based buffer overflow. Local access is required to approach this attack.
The exploit has been disclosed to the public and may be used.