CVE-2026-70343
Microsoft MPEG-2 Video Extension Remote Code Execution Vulnerability
Microsoft MPEG-2 Video Extension
CVSS
8.8HighExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.80%Chance of exploitation activity in the next 30 days, higher than 56% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 1.2.32.0MPEG-2 Video ExtensionCVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Vendor and government advisories 1
Vendors that say their products are affected, and agencies that issued alerts. Check each for the fixed release of the product you run.
Reports 1
1 outlet mention it. Reports are not confirmation; each links to its source.
Description
Heap-based buffer overflow in Microsoft MPEG-2 Video Extension allows an unauthorized attacker to execute code over a network.
Text from CVE List
Affected versions 1
- MPEG-2 Video Extensionaffected: 1.0.0.0 before 1.2.32.0CVE List