# CVE-2026-53413: Zoom Clients buffer overflow in annotator function

Source: https://junglewise.ai/threats/cve-2026-53413-zoom-clients-buffer-overflow-in-annotator-function  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-11. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-53413 · Severity: high · CVSS 8.3 · Published 2026-08-11

Zoom meeting clients contain a missing bounds check in the annotation feature that allows a malicious meeting participant to write data beyond allocated memory boundaries. This vulnerability could allow an attacker to execute arbitrary code on another participant's computer during a meeting, compromising confidentiality, integrity, and availability of their system.

Technologies: [Zoom Meeting SDK](https://junglewise.ai/threats/technologies/meeting-sdk), [Zoom Rooms](https://junglewise.ai/threats/technologies/rooms), [Zoom Video SDK](https://junglewise.ai/threats/technologies/zoom-video-sdk), [Zoom Workplace](https://junglewise.ai/threats/technologies/workplace), [Zoom Workplace VDI Client](https://junglewise.ai/threats/technologies/workplace-vdi-client). Vendors: [Zoom](https://junglewise.ai/threats/vendors/zoom).

## Quick answers

**Is CVE-2026-53413 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-53413 being exploited in the wild.

**How severe is CVE-2026-53413?** High severity, with a CVSS score of 8.3, published 11 August 2026.

**Which products and versions are affected?** Zoom Meeting SDK all supported platforms before version 7.1.0; Zoom Rooms all supported platforms before version 7.1.0; Zoom Video SDK all supported platforms before version 2.6.0; Zoom Workplace all supported platforms before version 7.1.0 and 7.0.6 in their respective branches; and 1 more.

**Is there a fix for CVE-2026-53413?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-53413 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-53413?** Check whether you run Zoom Meeting SDK, Zoom Rooms, Zoom Video SDK or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A missing bounds check in the annotator function of Zoom Clients allows buffer over-write, enabling remote code execution. The vulnerability requires network access and user interaction (attending a meeting with a malicious participant), but does not require authentication beyond joining the meeting. An attacker can exploit this by sending specially crafted annotation data to trigger the buffer overflow and achieve arbitrary code execution on the victim's machine. Patches are available in Zoom Workplace 7.1.0/7.0.6, Zoom Workplace VDI Client 7.0.11/6.6.16, Zoom Rooms 7.1.0, Zoom Meeting SDK 7.1.0, and Zoom Video SDK 2.6.0.

## Affected products

- Zoom Zoom Workplace all supported platforms before version 7.1.0 and 7.0.6 in their respective branches
- Zoom Zoom Workplace VDI Client Windows before versions 7.0.11 and 6.6.16 in their respective branches
- Zoom Zoom Rooms all supported platforms before version 7.1.0
- Zoom Zoom Meeting SDK all supported platforms before version 7.1.0
- Zoom Zoom Video SDK all supported platforms before version 2.6.0

## Timeline

- 2026-08-11: disclosed: CVE-2026-53413 published
- 2026-08-14: other: Zoom Security Bulletin ZSB-26015 revised to add Zoom Video SDK to affected products

## References

- [https://www.zoom.com/en/trust/security-bulletin/zsb-26015](https://www.zoom.com/en/trust/security-bulletin/zsb-26015)

## Related threats

- [Zoom Clients buffer over-read in annotator function](https://junglewise.ai/threats/cve-2026-53414-zoom-clients-buffer-over-read-in-annotator-function)
- [Zoom Rooms for Windows privilege escalation](https://junglewise.ai/threats/cve-2026-53409-zoom-rooms-for-windows-privilege-escalation)