PatchSiren cyber security CVE debrief
CVE-2026-41702 VMware CVE debrief
A Time-of-check Time-of-use (TOCTOU) vulnerability in VMware Fusion allows local privilege escalation to root. The flaw exists in a SETUID binary operation, where a race condition between checking a resource's state and using it can be exploited by an attacker with local non-administrative access. The CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) indicates high impact across confidentiality, integrity, and availability with low attack complexity. Broadcom (VMware's parent company) has issued a security advisory addressing this vulnerability.
- Vendor
- VMware
- Product
- Fusion
- CVSS
- HIGH 7.8
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-05-15
- Original CVE updated
- 2026-05-18
- Advisory published
- 2026-05-15
- Advisory updated
- 2026-05-18
Who should care
Organizations running VMware Fusion on macOS endpoints, particularly multi-user environments or systems where non-administrative users have local access. Security teams managing virtualized development environments and macOS endpoint security programs.
Technical summary
CVE-2026-41702 is a TOCTOU (CWE-367) vulnerability in VMware Fusion affecting versions prior to 26h1. The vulnerability resides in a SETUID binary operation where an attacker can win a race condition between state verification and resource use. Successful exploitation allows a local non-privileged user to escalate to root privileges on the host system. The attack requires local access but no user interaction, with low complexity. The fix version 26h1 addresses the race condition in the affected SETUID binary.
Defensive priority
HIGH
Recommended defensive actions
- Apply VMware Fusion 26h1 or later to remediate the TOCTOU vulnerability
- Restrict local access to systems running VMware Fusion to trusted users only
- Monitor for anomalous SETUID binary execution patterns on macOS hosts running Fusion
- Review Broadcom security advisory for additional vendor-specific mitigation guidance
Evidence notes
CVE published 2026-05-15; modified 2026-05-18. Vendor advisory confirms TOCTOU condition in SETUID binary. CWE-367 (Time-of-check Time-of-use race condition) identified. Affected versions: VMware Fusion prior to 26h1.
Official resources
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CVE-2026-41702 CVE record
CVE.org
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CVE-2026-41702 NVD detail
NVD
-
Source item URL
nvd_modified
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Mitigation or vendor reference
[email protected] - Vendor Advisory
2026-05-15