HIGH

CVE-2026-34180

Heap Buffer Over-read in ASN.1 Content Parsing

CVSS v3

7.5

HIGH

EPSS Score

0.5 %

exploit probability

CISA KEV

known exploited

Exploitation

none

SSVC status

Description

Microsoft Security Update (CVE-2026-34180)

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2026-06-19
MSRC Title: Heap Buffer Over-read in ASN.1 Content Parsing

Frequently asked questions

What is CVE-2026-34180?

Microsoft Security Update (CVE-2026-34180)

Is CVE-2026-34180 actively exploited?

Active exploitation of CVE-2026-34180 has not been confirmed. The EPSS score is 0.5%, indicating the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-34180?

CVE-2026-34180 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Is CVE-2026-34180 affecting your environment?

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