Is CVE-2023-23363 actively exploited?

No active exploitation of CVE-2023-23363 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-23363 be exploited remotely?

Yes. CVE-2023-23363 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-23363?

CVE-2023-23363 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2023-23363

CWE-120Published: September 22, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

A buffer copy without checking size of input vulnerability has been reported to affect QNAP operating system. If exploited, the vulnerability possibly allows remote users to execute code via unspecified vectors.

We have already fixed the vulnerability in the following versions:

QTS 4.3.6.2441 build 20230621 and later

QTS 4.3.3.2420 build 20230621 and later

QTS 4.2.6 build 20230621 and later

QTS 4.3.4.2451 build 20230621 and later

NVD Source

Risk Analysis

QNAP QTS operating systems are affected by a buffer copy vulnerability that lacks input size validation, which could allow remote code execution. This is a critical risk with a CVSS score of 9.8.

There is no known public exploit, and it is not tracked in the CISA KEV catalog. The flaw is remotely exploitable with low complexity.

Recommended Action

Apply the provided firmware updates for QTS versions 4.3.6, 4.3.3, 4.2.6, or 4.3.4 as specified in the vendor advisory.

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-2023-23363 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.