9.8

CVE-2024-21899: qnap systems inc. qts Improper Authentication

CVSS: 9.8v3.1CriticalModified
Published 08-03-2024Last modified 01-08-2024
Open JSON

Vulnerability summary

CVE-2024-21899 is a critical (CVSS 9.8) Improper Authentication vulnerability in qnap systems inc. qts. EPSS estimates a 24.37% chance of exploitation in the next 30 days, higher than 97.8% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
24.37%
0%100%
High · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 08-03-2024
    PublishedVulnerability first disclosed.
  2. 01-08-2024
    Last modifiedVulnerability information updated.

Description

An improper authentication vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow users to compromise the security of the system via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.3.2578 build 20231110 and later QTS 4.5.4.2627 build 20231225 and later QuTS hero h5.1.3.2578 build 20231110 and later QuTS hero h4.5.4.2626 build 20231225 and later QuTScloud c5.1.5.2651 and later

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

24.37%

Chance of exploitation in the next 30 days

Percentile

98%

Versus all other CVEs

30-day change

0.00 pp

From 24.37% on 20-09-2026

20-09-202620-10-2026
EPSS score
24.37%

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

Qnap3 products
  • qts< 4.5.4.2627 | ≥ 5.1.0, < 5.1.3.2578 | 4.5.4.2627 | 5.1.3.2578
  • quts_hero< h4.5.4.2626 | ≥ h5.1.0, < h5.1.3.2578 | h4.5.4.2626 | h5.1.3.2578
  • qutscloud< c5.1.5.2651
Qnap systems inc.3 products
  • qts≥ 5.1.x, < 5.1.3.2578 build 20231110 | ≥ 4.5.x, < 4.5.4.2627 build 20231225
  • quts hero≥ h5.1.x, < h5.1.3.2578 build 20231110 | ≥ h4.5.x, < h4.5.4.2626 build 20231225
  • qutscloud≥ c5.x.x, < c5.1.5.2651

2 vendors · 6 products

References

1 links