What is CVE-2020-2505?

CVE-2020-2505 is a low-severity vulnerability in QNAP Qes, classified under Generation of Error Message Containing Sensitive Information. CVSS score: 2.3/10. Published 2020-12-24.

How severe is CVE-2020-2505?

Low severity. CVSS v3 base score is 2.3 out of 10.

Information disclosure in QNAP Qes

CVE-2020-2505

If exploited, this vulnerability could allow attackers to gain sensitive information via generation of error messages. QNAP has already fixed these issues in QES 2.1.1 Build 20201006 and later.

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

CVSS v3 metric

CVSS v3 base score 2.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (20.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · 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-20-17 (Vendor Advisory)

Frequently asked questions

What is CVE-2020-2505?: CVE-2020-2505 is a low-severity vulnerability in QNAP Qes, classified under Generation of Error Message Containing Sensitive Information. CVSS score: 2.3/10. Published 2020-12-24.
How severe is CVE-2020-2505?: Low severity. CVSS v3 base score is 2.3 out of 10.