CVE-2026-61371 | Microsoft AVML before 0.17.0 could follow a symlink when ope… | CVSS 7.5 HIGH

Description

Microsoft AVML before 0.17.0 could follow a symlink when opening a destination output path on Unix, allowing truncation/overwrite of the symlink target. The destructive effect is performed at open-time via O_TRUNC, and can happen before full input validation completes (“truncation-before-validation”).

Metadata

CVE ID: CVE-2026-61371
State: PUBLISHED
Assigner: mitre
Reserved: 2026-07-08 00:00 UTC
Published: 2026-07-15 00:00 UTC
Last updated: 2026-07-15 19:26 UTC
Primary CWE: CWE-59
CWE-59 Improper Link Resolution Before File Access ('Link Fo…
Vendor / Product: n/a / n/a
Sources: cve.org · NVD

Severity & Metrics

7.5 HIGH CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: yes
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
n/a	n/a	—	n/a

Weakness (CWE)

CWE	Source	Description
—	cna	n/a
CWE-59	adp	CWE-59 Improper Link Resolution Before File Access ('Link Following')

CVSS scores (1)

Score	Severity	Version	Source	Vector
7.5	HIGH	3.1	adp	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References (3)