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PatchSiren cyber security CVE debrief

CVE-2026-53410 Zoom Communications CVE debrief

A time-of-check to time-of-use (TOCTOU) race condition was found in the installation and uninstallation process of certain Zoom Clients for Windows. This vulnerability, identified as CVE-2026-53410, could allow an authenticated local user to escalate privileges. The issue arises during the installation and uninstallation process, potentially impacting users of Zoom Clients for Windows. The vulnerability's severity is classified as HIGH with a CVSS score of 7. Users should be aware of this vulnerability and take steps to ensure their systems are updated to prevent potential exploitation.

Vendor
Zoom Communications
Product
Zoom Clients
CVSS
HIGH 7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-16
Original CVE updated
2026-08-17
Advisory published
2026-07-16
Advisory updated
2026-08-17

Who should care

Users of Zoom Clients for Windows, particularly those in managed environments, should be aware of this vulnerability and take steps to ensure their systems are updated. This includes IT administrators, security teams, and operators responsible for maintaining Zoom Client installations on Windows systems. Additionally, security teams should review compensating controls for exposed systems while remediation is scheduled and verified.

Technical summary

The TOCTOU race condition occurs during the installation and uninstallation process of certain Zoom Clients for Windows. An authenticated local user could exploit this vulnerability to escalate privileges. The vulnerability affects Zoom Clients for Windows and has a CVSS score of 7, indicating a HIGH severity level. Users of Zoom Clients for Windows should prioritize updating their clients to the latest version to mitigate the risk of privilege escalation.

Defensive priority

High priority should be given to updating Zoom Clients for Windows to prevent potential privilege escalation. Additionally, security teams should focus on verifying the accuracy of the vulnerability's details and reviewing compensating controls for exposed systems.

Recommended defensive actions

  • Update Zoom Clients for Windows to the latest version.
  • Verify that all Zoom Clients for Windows are running with the latest security patches.
  • Monitor systems for potential exploitation attempts.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record was published on 2026-07-16T21:17:21.377Z and has not been modified since then. The NVD entry is currently Received. This information is based on the supplied source corpus and may be subject to change as new evidence emerges. Defenders should verify the accuracy of this information and be aware of potential changes in the vulnerability's details.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-53410 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-53410

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-53410 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-53410

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.