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TI-2023-09209 Aliases CVE-2023-23363GHSA-cp8h-xhxp-4q49

Buffer overflow in QNAP QTS

Priority MEDIUM 45CWE-120Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.

Summary

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

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00919 60th percentileScored 2026-11-07
Fix Fixed QTS (QNAP Systems Inc.): 4.3.6.2441 build 20230621, 4.3.3.2420 build 20230621, 4.2.6 build 20230621 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
QNAPQTSbefore 4.3.6.2441 build 20230621; before 4.3.3.2420 build 20230621; before 4.2.6 build 20230621; before 4.3.4.2451 build 202306214.3.6.2441 build 20230621, 4.3.3.2420 build 20230621, 4.2.6 build 20230621, 4.3.4.2451 build 20230621Patch availableCNA
  • QTS VendorQNAP Affected before 4.3.6.2441 build 20230621; before 4.3.3.2420 build 20230621; before 4.2.6 build 20230621; before 4.3.4.2451 build 20230621 Fixed in 4.3.6.2441 build 20230621, 4.3.3.2420 build 20230621, 4.2.6 build 20230621, 4.3.4.2451 build 20230621 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*4.3.3 to before 4.3.3.2420; 4.3.4 to before 4.3.4.245; 4.3.6 to before 4.3.6.2441VulnerableQNAP
  • cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:* Versions 4.3.3 to before 4.3.3.2420; 4.3.4 to before 4.3.4.245; 4.3.6 to before 4.3.6.2441 Vulnerable ·QNAP

Remediation

  • Fix · CNA QTS (QNAP Systems Inc.) Fixed in 4.3.6.2441 build 20230621, 4.3.3.2420 build 20230621, 4.2.6 build 20230621, 4.3.4.2451 build 20230621

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-23363
  2. 2026-10-03 Alias added: GHSA-cp8h-xhxp-4q49

References

Advisory 1

  • TI-2020-02221 Command Injection Vulnerability in QTS and QuTS hero KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-05101 Improper input validation in QNAP NAS devices KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-14137 Improper input validation in QNAP QTS KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-14131 Cross-site scripting in QNAP QTS KEVCVSS 3.1HIGH 8.0
See all 282 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences