Is CVE-2023-21066 actively exploited?

No active exploitation of CVE-2023-21066 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-21066 be exploited remotely?

Yes. CVE-2023-21066 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-21066?

CVE-2023-21066 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2023-21066

CRITICAL

CVE-2023-21066

CWE-787Published: June 28, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

In cd_CodeMsg of cd_codec.c, there is a possible out of bounds write due to a heap buffer overflow. This could lead to remote code execution with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-250100597References: N/A

NVD Source

Risk Analysis

A heap buffer overflow in the Android kernel allows for remote code execution without requiring user interaction or elevated privileges. This critical flaw is remotely exploitable.

There is no known public exploit, and the vulnerability is not listed in the KEV catalog.

Recommended Action

Apply the latest Android security updates provided by Google or the device manufacturer.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2023-21066 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.