What is CVE-2021-38687?

CVE-2021-38687 is a high-severity vulnerability in Qnap Qts, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.1/10. Published 2021-12-29.

How severe is CVE-2021-38687?

High severity. CVSS v3 base score is 8.1 out of 10.

Buffer overflow in Qnap Qts

CVE-2021-38687

A stack buffer overflow vulnerability has been reported to affect QNAP NAS running Surveillance Station. If exploited, this vulnerability allows attackers to execute arbitrary code. We have already fixed this vulnerability in the following…

Vulnerability class: Buffer Overflow

EPSS: 0.013 (66.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Qnap Qts — versions 5.0.0, 4.3.6, 4.3.3
Qnap Surveillance_station
Qnap Systems Inc. Surveillance Station — versions unspecified

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

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

Frequently asked questions

What is CVE-2021-38687?: CVE-2021-38687 is a high-severity vulnerability in Qnap Qts, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.1/10. Published 2021-12-29.
How severe is CVE-2021-38687?: High severity. CVSS v3 base score is 8.1 out of 10.