What is CVE-2025-46789?

CVE-2025-46789 is a medium-severity vulnerability in Zoom, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.5/10. Published 2025-07-10.

How severe is CVE-2025-46789?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2025-46789 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Zoom

CVE-2025-46789

Classic buffer overflow in certain Zoom Clients for Windows may allow an authorized user to conduct a denial of service via network access.

Vulnerability class: Buffer Overflow

Published 2025-07-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.005 (39.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Zoom
Zoom Communications Inc. Clients For Windows — versions 0

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

https://www.zoom.com/en/trust/security-bulletin/zsb-25024/ (Broken Link, Vendor Advisory)

Frequently asked questions

What is CVE-2025-46789?: CVE-2025-46789 is a medium-severity vulnerability in Zoom, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.5/10. Published 2025-07-10.
How severe is CVE-2025-46789?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2025-46789 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.