8.8

CVE-2021-38686: qnap systems inc. qvr Improper Authentication

CVSS: 8.8v3.1HighModified
Published 26-11-2021Last modified 16-09-2024
Open JSON

Vulnerability summary

CVE-2021-38686 is a high (CVSS 8.8) Improper Authentication vulnerability in qnap systems inc. qvr. EPSS estimates a 0.97% chance of exploitation in the next 30 days, higher than 61.4% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.97%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 26-11-2021
    PublishedVulnerability first disclosed.
  2. 16-09-2024
    Last modifiedVulnerability information updated.

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

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.97%

Chance of exploitation in the next 30 days

Percentile

61%

Versus all other CVEs

30-day change

0.00 pp

From 0.97% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.97%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Qnap1 product
Qnap systems inc.1 product
  • qvr≥ unspecified, < QVR FW 5.1.6 build 20211109

2 vendors · 2 products

References

1 links