# CVE-2026-53414: Zoom Clients buffer over-read in annotator function

Source: https://junglewise.ai/threats/cve-2026-53414-zoom-clients-buffer-over-read-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-2026-53414 · Severity: medium · CVSS 6.5 · Published 2026-08-11

Zoom Clients contain a missing bounds check in the annotation tool that can be exploited by a meeting participant to crash another participant's application, causing a temporary denial of service. An attacker needs only to participate in a meeting and send a specially crafted annotation to trigger the issue, requiring no special permissions or credentials.

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 for Windows](https://junglewise.ai/threats/technologies/workplace-vdi-client-for-windows). Vendors: [Zoom](https://junglewise.ai/threats/vendors/zoom).

## Quick answers

**Is CVE-2026-53414 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-53414 being exploited in the wild.

**How severe is CVE-2026-53414?** Medium severity, with a CVSS score of 6.5, published 11 August 2026.

**Which products and versions are affected?** Zoom Meeting SDK before 7.1.0; Zoom Rooms before 7.1.0; Zoom Video SDK before 2.6.0; Zoom Workplace before 7.1.0 and 7.0.6 (branch-dependent); and 1 more.

**Is there a fix for CVE-2026-53414?** 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-2026-53414 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-53414?** 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 allows a buffer over-read vulnerability in Zoom Clients. The vulnerability is triggered via network access by a malicious meeting participant who can send a crafted annotation payload to another participant. The attack requires user interaction (victim must be in an active meeting with the attacker) but no authentication beyond normal meeting participation. A successful exploit results in a denial of service condition affecting the targeted participant's client. Patches are available in Zoom Workplace 7.1.0 / 7.0.6, Zoom Rooms 7.1.0, Zoom Meeting SDK 7.1.0, Zoom Video SDK 2.6.0, and Zoom Workplace VDI Client 7.0.11 / 6.6.16.

## Affected products

- Zoom Zoom Workplace before 7.1.0 and 7.0.6 (branch-dependent)
- Zoom Zoom Workplace VDI Client for Windows before 7.0.11 and 6.6.16 (branch-dependent)
- Zoom Zoom Rooms before 7.1.0
- Zoom Zoom Meeting SDK before 7.1.0
- Zoom Zoom Video SDK before 2.6.0

## Timeline

- 2026-08-11: disclosed: Initial publication of ZSB-26016
- 2026-08-14: other: Revised bulletin adding Zoom Video SDK and correcting version information

## References

- [https://www.zoom.com/en/trust/security-bulletin/zsb-26016](https://www.zoom.com/en/trust/security-bulletin/zsb-26016)

## Related threats

- [Zoom Clients for Windows improper certificate validation](https://junglewise.ai/threats/cve-2026-108184-improper-certificate-validation-in-certain-zoom-clients-for)
- [Zoom Clients buffer overflow in annotator function](https://junglewise.ai/threats/cve-2026-53413-zoom-clients-buffer-overflow-in-annotator-function)
- [Zoom Rooms for Windows privilege escalation](https://junglewise.ai/threats/cve-2026-53409-zoom-rooms-for-windows-privilege-escalation)