CVE-2021-34345 json
Stack Based Overflow Vulnerability in NVR Storage Expansion
published 2021-09-10 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-21005
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.6%
- EPSS 1.6% chance of exploitation in 30 days, percentile 75%
- public exploits
- 0
- none known
Summary
A stack buffer overflow vulnerability has been reported to affect QNAP device running NVR Storage Expansion. If exploited, this vulnerability allows attackers to execute arbitrary code. We have already fixed this vulnerability in the following versions of NVR Storage Expansion: NVR Storage Expansion 1.0.6 ( 2021/08/03 ) and later
Patch / fix
- QNAP Systems Inc. NVR Storage Expansion 1.0.6 ( 2021/08/03 )
Exploit prediction
1.58% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Affected products
- QNAP Systems Inc. NVR Storage Expansion
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
qnap.com
/en/security-advisory/qsa-21-36
vendor-advisory
Sources
- CVE List CVE-2021-34345
- NVD CVE-2021-34345
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