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CVE-2026-7383: Possible Heap Buffer Overflow in ASN.1 Multibyte String Conversion

highCVSS 8.1CVE-2026-7383

CSIRTS triage

Other
What
There is a possible heap buffer overflow in ASN.1 multibyte string conversion.
Who is affected
Systems processing ASN.1 multibyte strings.
Urgency
Remediation is high urgency due to the high severity rating and potential for exploitation.
Action
Implement the recommended updates to address this vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 8.1
Published
2026-08-06
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-7383

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-7383coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

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