What is CVE-2021-34346?

CVE-2021-34346 is a critical-severity vulnerability in QNAP Nvr Storage Expansion, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2021-09-10.

How severe is CVE-2021-34346?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in QNAP Nvr Storage Expansion

CVE-2021-34346

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

Vulnerability class: Buffer Overflow

EPSS: 0.016 (73.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Qnap Nvr_storage_expansion
Qnap Nvr_storage_expansion_firmware
Qnap Systems Inc. Nvr Storage Expansion — versions unspecified

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

security@qnapsecurity.com.tw (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-34346?: CVE-2021-34346 is a critical-severity vulnerability in QNAP Nvr Storage Expansion, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2021-09-10.
How severe is CVE-2021-34346?: Critical severity. CVSS v3 base score is 9.8 out of 10.