CVE-2021-28816

moderate-risk
Published 2021-09-10

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

Do I need to act?

~
1.2% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.6/10 High
NETWORK / LOW complexity

Affected Products (3)

Qts

Affected Vendors

Qnap

References (2)

Vendor Advisory https://www.qnap.com/en/security-advisory/qsa-21-33
Vendor Advisory https://www.qnap.com/en/security-advisory/qsa-21-33
39
/ 100
moderate-risk
Severity 27/34 · High
Exploitability 3/34 · Minimal
Exposure 9/34 · Low