CVE-2023-34046

VMware Fusion TOCTOU local privilege escalation vulnerability

HIGH
7
CVSS Score
Published: October 20, 2023 at 08:59 AM UTC
Updated: June 17, 2026 at 06:02 AM UTC
1 product affected across 1 vendorFusion· also runs on 1 platform

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Severity
HIGH7
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

Description

VMware Fusion(13.x prior to 13.5) contains a TOCTOU (Time-of-check Time-of-use) vulnerability that occurs during installation for the first time (the user needs to drag or copy the application to a folder from the '.dmg' volume) or when installing an upgrade. A malicious actor with local non-administrative user privileges may exploit this vulnerability to escalate privileges to root on the system where Fusion is installed or being installed for the first time.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

13.0.0 ≤ v < 13.513.x ≤ v < 13.513.x
Affected range stops below 13.5, so it looks safe — our inference, not a vendor statement
apple-macos (environment)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
LOCAL
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-367

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