What is CVE-2023-49646?

CVE-2023-49646 is a medium-severity vulnerability in Zoom Meeting Software Development Kit, classified under Improper Verification of Cryptographic Signature. CVSS score: 6.4/10. Published 2023-12-13.

How severe is CVE-2023-49646?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Auth bypass in Zoom Meeting Software Development Kit

CVE-2023-49646

Improper authentication in some Zoom clients before version 5.16.5 may allow an authenticated user to conduct a denial of service via network access.

Published 2023-12-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L.

EPSS exploit prediction

EPSS: 0.004 (32.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.0% 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 Video Software Development Kit
Zoom Virtual Desktop Infrastructure
Zoom
Zoom Video Communications, Inc. Clients — versions See references

Weakness classification (CWE)

References

www.zoom.com/en/trust/security-bulletin/ZSB-23062/ (Vendor Advisory)

Frequently asked questions

What is CVE-2023-49646?: CVE-2023-49646 is a medium-severity vulnerability in Zoom Meeting Software Development Kit, classified under Improper Verification of Cryptographic Signature. CVSS score: 6.4/10. Published 2023-12-13.
How severe is CVE-2023-49646?: Medium severity. CVSS v3 base score is 6.4 out of 10.