What is CVE-2025-27439?

CVE-2025-27439 is a high-severity vulnerability in Zoom Meeting Software Development Kit, classified under Buffer Underwrite. CVSS score: 8.5/10. Published 2025-03-11.

How severe is CVE-2025-27439?

High severity. CVSS v3 base score is 8.5 out of 10.

Vulnerability in Zoom Meeting Software Development Kit

CVE-2025-27439

Buffer underflow in some Zoom Workplace Apps may allow an authenticated user to conduct an escalation of privilege via network access.

Published 2025-03-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (36.9th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Zoom Meeting Software Development Kit
Zoom Rooms
Zoom Rooms Controller
Zoom Workplace
Zoom Workplace Desktop
Zoom Workplace Virtual Desktop Infrastructure
Zoom Communications, Inc Workplace Apps — versions See references.

Weakness classification (CWE)

CWE-124 — Buffer Underwrite

References

www.zoom.com/en/trust/security-bulletin/zsb-25011/ (Vendor Advisory)

Frequently asked questions

What is CVE-2025-27439?: CVE-2025-27439 is a high-severity vulnerability in Zoom Meeting Software Development Kit, classified under Buffer Underwrite. CVSS score: 8.5/10. Published 2025-03-11.
How severe is CVE-2025-27439?: High severity. CVSS v3 base score is 8.5 out of 10.