9.8

CVE-2021-28800: qnap systems inc. qts OS Command Injection

CVSS: 9.8v3.1CriticalModified
Published 24-06-2021Last modified 16-09-2024
Open JSON

Vulnerability summary

CVE-2021-28800 is a critical (CVSS 9.8) OS Command Injection vulnerability in qnap systems inc. qts. EPSS estimates a 1.43% chance of exploitation in the next 30 days, higher than 72.7% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
1.43%
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. 24-06-2021
    PublishedVulnerability first disclosed.
  2. 16-09-2024
    Last modifiedVulnerability information updated.

Description

A command injection vulnerability has been reported to affect QNAP NAS running legacy versions of QTS. If exploited, this vulnerability allows attackers to execute arbitrary commands in a compromised application. This issue affects: QNAP Systems Inc. QTS versions prior to 4.3.6.1663 Build 20210504; versions prior to 4.3.3.1624 Build 20210416. This issue does not affect: QNAP Systems Inc. QTS 4.5.3. QNAP Systems Inc. QuTS hero h4.5.3. QNAP Systems Inc. QuTScloud c4.5.5.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.43%

Chance of exploitation in the next 30 days

Percentile

73%

Versus all other CVEs

30-day change

0.00 pp

From 1.43% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.43%

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
  • qts< 4.3.3.1624 | ≥ 4.3.4, < 4.3.6.1663
Qnap systems inc.1 product
  • qts≥ unspecified, < 4.3.6.1663 Build 20210504 | ≥ unspecified, < 4.3.3.1624 Build 20210416

2 vendors · 2 products

References

1 links