8.8

CVE-2021-28816: qnap systems inc. qts Out-of-bounds Write

CVSS: 8.8v3.1HighModified
Published 10-09-2021Last modified 17-09-2024

Vulnerability summary

CVE-2021-28816 is a high (CVSS 8.8) Out-of-bounds Write vulnerability in qnap systems inc. qts. EPSS estimates a 0.93% chance of exploitation in the next 30 days, higher than 59.9% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (NVD)
EPSS score
0.93%
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. 10-09-2021
    PublishedVulnerability first disclosed.
  2. 17-09-2024
    Last modifiedVulnerability information updated.

Description

A stack buffer overflow vulnerability has been reported to affect QNAP device running QTS, QuTScloud, QuTS hero. If exploited, this vulnerability allows attackers to execute arbitrary code. We have already fixed this vulnerability in the following versions of QTS, QuTScloud, QuTS hero: QTS 4.5.4.1715 build 20210630 and later QTS 5.0.0.1716 build 20210701 and later QTS 4.3.3.1693 build 20210624 and later QTS 4.3.6.1750 build 20210730 and later QuTScloud c4.5.6.1755 and later QuTS hero h4.5.4.1771 build 20210825 and later

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.93%

Chance of exploitation in the next 30 days

Percentile

60%

Versus all other CVEs

30-day change

0.00 pp

From 0.93% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.93%

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< 4.3.3.1693 | ≥ 4.3.4, < 4.3.6.1750 | ≥ 4.4.0, < 4.5.4.1715 | ≥ 5.0.0, < 5.0.0.1716
  • quts_hero< h4.5.4.1771
  • qutscloud< c4.5.6.1755
Qnap systems inc.3 products
  • qts≥ unspecified, < 4.5.4.1715 build 20210630 | ≥ unspecified, < 5.0.0.1716 build 20210701 | ≥ unspecified, < 4.3.3.1693 build 20210624 | ≥ unspecified, < 4.3.6.1750 build 20210730
  • quts hero≥ unspecified, < h4.5.4.1771 build 20210825
  • qutscloud≥ unspecified, < c4.5.6.1755

2 vendors · 6 products

References

1 links