Is CVE-2023-21494 actively exploited?

No active exploitation of CVE-2023-21494 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-21494 be exploited remotely?

Yes. CVE-2023-21494 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-21494?

CVE-2023-21494 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2023-21494

CWE-20Published: May 4, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Potential buffer overflow vulnerability in auth api in mm_Authentication.c in Shannon baseband prior to SMR May-2023 Release 1 allows remote attackers to cause invalid memory access.

NVD Source

Risk Analysis

A buffer overflow in the authentication API of the Shannon baseband allows remote attackers to cause invalid memory access. This critical vulnerability is rated 9.8, reflecting the high risk of remote exploitation.

No public exploit is currently known, and it is not in the KEV catalog. The vulnerability is remotely exploitable with low attack complexity.

Recommended Action

Install the SMR May-2023 Release 1 or later security update provided by Samsung.

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-2023-21494 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.