Buffer overflow in Zoom Communications Clients

CVE-2026-53413

Missing bounds check in the annotator function of Zoom Clients allows buffer over-write, which may allow a meeting participant to achieve remote code execution of another participant via network access.

Vulnerability class: Buffer Overflow

Published · last modified .

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (39.9th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-53413: fell from 0.056 to 0.005.

EPSS over last 30 days · oldest: 0.056 · newest: 0.005 · change: -0.051

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2026-53413?
CVE-2026-53413 is a high-severity vulnerability in Zoom Communications Clients, classified under Out-of-bounds Write. CVSS score: 8.3/10. Published 2026-08-11.
How severe is CVE-2026-53413?
High severity. CVSS v3 base score is 8.3 out of 10.
Is CVE-2026-53413 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.