What is CVE-2023-42721?

CVE-2023-42721 is a medium-severity vulnerability in Google Android. CVSS score: 5.5/10. Published 2023-12-04.

How severe is CVE-2023-42721?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Google Android

CVE-2023-42721

In flv extractor, there is a possible missing verification incorrect input. This could lead to local denial of service with no additional execution privileges needed

Published 2023-12-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.001 (0.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 1st percentile — 0.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Google Android — versions 11.0
Unisoc Sc9863a
Unisoc (Shanghai) Technologies Co., Ltd. Sc9863a — versions Android11

References

www.unisoc.com/en_us/secy/announcementDetail/https://www.unisoc.com/en_us/secy/… (Vendor Advisory)

Frequently asked questions

What is CVE-2023-42721?: CVE-2023-42721 is a medium-severity vulnerability in Google Android. CVSS score: 5.5/10. Published 2023-12-04.
How severe is CVE-2023-42721?: Medium severity. CVSS v3 base score is 5.5 out of 10.