CVE-2021-38686 | BDVDB-2026-164902 Detail

QNAP SystemsQVR

Description#

An improper authentication vulnerability has been reported to affect QNAP device, VioStor. If exploited, this vulnerability allows attackers to compromise the security of the system. We have already fixed this vulnerability in the following versions of QVR: QVR FW 5.1.6 build 20211109 and later

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

CWE-287 Improper Authentication

References#

https://www.qnap.com/en/security-advisory/qsa-21-52

Exploit#

No public exploit known

History#

Version 12021-11-26Record published in the CVE List.
Version 22024-09-16Most recent update recorded in the CVE List.

Published

Published: 2021-11-26
Last modified: 2024-09-16

Vendor information

Vendor: QNAP Systems
Product: QVR

All QNAP Systems vulnerabilities

Score

8.8 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 62.3.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Authentication Issues

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
< QVR FW 5.1.6 build 20211109
Fixed
QVR FW 5.1.6 build 20211109

Scoring System

CVSS v4.0

Not available

CVSS v3.1

8.8 High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).