HIGH

CVE-2026-83997

Windows Message Queuing Remote Code Execution Vulnerability

CVSS v3

8.1

HIGH

EPSS Score

0.7 %

exploit probability, as of 2026-09-28

CISA KEV

known exploited

Exploitation

—

SSVC status

Description

Use after free in Windows Message Queuing allows an unauthorized attacker to execute code over a network.

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Published: 2026-09-08
Last Modified: 2026-09-11

Frequently asked questions

What is CVE-2026-83997?

Use after free in Windows Message Queuing allows an unauthorized attacker to execute code over a network.

Is CVE-2026-83997 actively exploited?

Active exploitation of CVE-2026-83997 has not been confirmed. Its EPSS score was 0.7% on 2026-09-28, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-83997?

CVE-2026-83997 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C.

Is CVE-2026-83997 affecting your environment?

Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.

Check an IP Search CVEs SIEM & TIP integrations

No credit card required · 500 free checks/month · Free API key

Other 2026 vulnerabilities worth triaging

Ranked by exploit probability (EPSS).

Back to CVE Database