9.8

CVE-2021-34346: qnap systems inc. nvr storage expansion Out-of-bounds Write

CVSS: 9.8v3.1CriticalModified
Published 10-09-2021Last modified 16-09-2024
Open JSON

Vulnerability summary

CVE-2021-34346 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in qnap systems inc. nvr storage expansion. EPSS estimates a 1.58% chance of exploitation in the next 30 days, higher than 75.2% 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
1.58%
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. 16-09-2024
    Last modifiedVulnerability information updated.

Description

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

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.58%

Chance of exploitation in the next 30 days

Percentile

75%

Versus all other CVEs

30-day change

0.00 pp

From 1.58% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.58%

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
Qnap systems inc.1 product

2 vendors · 2 products

References

1 links