How severe is CVE-2023-23355?

CVE-2023-23355 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2023-23355 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-23355?

CVE-2023-23355 primarily affects Qnap Qvr. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-23355?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-23355 published?

CVE-2023-23355 was published on 2023-03-29 and last updated on 2026-06-17.

CVE-2023-23355

CVE-2023-23355 is a medium-severity vulnerability in Qnap Qvr with a CVSS 3.x base score of 6.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-77.

Key facts

Severity: Medium (CVSS 3.x base score 6.6)
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-77
Affected product: Qnap Qvr
Published: 2023-03-29
Last modified: 2026-06-17

Description

An OS command injection vulnerability has been reported to affect QNAP operating systems. If exploited, the vulnerability possibly allows remote authenticated administrators to execute commands via unspecified vectors. QES is not affected. We have already fixed the vulnerability in the following versions: QTS 5.0.1.2346 build 20230322 and later QTS 4.5.4.2374 build 20230416 and later QuTS hero h5.0.1.2348 build 20230324 and later QuTS hero h4.5.4.2374 build 20230417 and later QuTScloud c5.0.1.2374 and later

Frequently asked questions

What is CVE-2023-23355?: An OS command injection vulnerability has been reported to affect QNAP operating systems. If exploited, the vulnerability possibly allows remote authenticated administrators to execute commands via unspecified vectors. QES is not affected. We have already fixed the vulnerability in the following versions: QTS 5.0.1.2346 build 20230322 and later QTS 4.5.4.2374 build 20230416 and later QuTS hero h5.0.1.2348 build 20230324 and later QuTS hero h4.5.4.2374 build 20230417 and later QuTScloud c5.0.1.2374 and later
How severe is CVE-2023-23355?: CVE-2023-23355 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2023-23355 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-23355?: CVE-2023-23355 primarily affects Qnap Qvr. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-23355?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-23355 published?: CVE-2023-23355 was published on 2023-03-29 and last updated on 2026-06-17.

References

https://www.qnap.com/en/security-advisory/qsa-23-10

Affected products (11)

cpe:2.3:a:qnap:qvr:-:*:*:*:*:*:*:*
cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*
cpe:2.3:o:qnap:quts_hero:*:*:*:*:*:*:*:*
cpe:2.3:o:qnap:qutscloud:-:*:*:*:*:*:*:*
cpe:2.3:o:qnap:qvp-41b_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qnap:qvp-63b_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qnap:qvp-85b_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qnap:qvp-21a_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qnap:qvp-41a_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qnap:qvp-63a_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:qnap:qvp-85a_firmware:-:*:*:*:*:*:*:*

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