What is CVE-2020-2499?

CVE-2020-2499 is a medium-severity vulnerability in QNAP Qes, classified under Use of Hard-coded Password. CVSS score: 6.3/10. Published 2020-12-24.

How severe is CVE-2020-2499?

Medium severity. CVSS v3 base score is 6.3 out of 10.

Vulnerability in QNAP Qes

CVE-2020-2499

A hard-coded password vulnerability has been reported to affect earlier versions of QES. If exploited, this vulnerability could allow attackers to log in with a hard-coded password. QNAP has already fixed the issue in QES 2.1.1 Build 20200515 and later.

Published 2020-12-24 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:L/I:H/A:N.

EPSS exploit prediction

EPSS: 0.014 (71.0th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: +0.000

Affected products

QNAP Qes — versions 2.1.1
QNAP Systems Inc. Qes — versions unspecified

Weakness classification (CWE)

References

www.qnap.com/zh-tw/security-advisory/qsa-20-19 (Vendor Advisory)

Frequently asked questions

What is CVE-2020-2499?: CVE-2020-2499 is a medium-severity vulnerability in QNAP Qes, classified under Use of Hard-coded Password. CVSS score: 6.3/10. Published 2020-12-24.
How severe is CVE-2020-2499?: Medium severity. CVSS v3 base score is 6.3 out of 10.