High severity · published Aug 11, 2026
CVE-2026-53413
Zoom Clients - Buffer Over-write
8.3
CVSS
0.5%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ZC
Zoom Clients · Zoom Communications
see references · source: vendor
In the news
VulnerabilityCritical
Zoom Patches “Zoomsday” Zero-Click Flaw Enabling Remote Code Execution
Zoom patches a zero-click flaw that could let a meeting participant execute code on another user’s computer through the annotation feature. Zoom has patched four vulnerabilities, including a critical zero-click flaw, tracked as CVE-2026-53413, in its annotation feature. CVE-2026-53413 is a memory corruption issue found by A Security that could allow a meeting participant to […]
Aug 11, 2026·Security Affairs
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-53413
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-53413
www.zoom.com
https://www.zoom.com/en/trust/security-bulletin/zsb-26015
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