What is CVE-2026-30903?

CVE-2026-30903 is a critical-severity vulnerability in Zoom Workplace Desktop, classified under External Control of File Name or Path. CVSS score: 9.6/10. Published 2026-03-11.

How severe is CVE-2026-30903?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Vulnerability in Zoom Workplace Desktop

CVE-2026-30903

External Control of File Name or Path in the Mail feature of Zoom Workplace for Windows before 6.6.0 may allow an unauthenticated user to conduct an escalation of privilege via network access.

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

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (39.2th percentile), scored 2026-10-23.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.001

Affected products

Zoom Workplace Desktop
Zoom Workplace Virtual Desktop Infrastructure
Zoom Communications Workplace — versions see references

Weakness classification (CWE)

References

www.zoom.com/en/trust/security-bulletin/zsb-26005 (Vendor Advisory)

Frequently asked questions

What is CVE-2026-30903?: CVE-2026-30903 is a critical-severity vulnerability in Zoom Workplace Desktop, classified under External Control of File Name or Path. CVSS score: 9.6/10. Published 2026-03-11.
How severe is CVE-2026-30903?: Critical severity. CVSS v3 base score is 9.6 out of 10.