Published Jul 29, 2026Sources checked Oct 28, 2026
8.7HIGHCVSS out of 10
What this means
Review the available evidence
CVE-2026-55995 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: Aug 11, 2026
CBL-Mariner Releases
Vendor-listed releases
0.102-2
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-2026-55995?
A Double Free vulnerability in open-iscsi allows an unauthenticated MITM attacker to cause DoS.
This issue affects open-iscsi: from ? through 56718d4e9d1a4f51c30697b5c0534144bb41c9bb.