Sensitive information via generation of error messages vulnerability in QES

published 2020-12-24 5y ago modified 2026-06-17 4mo ago also EUVD-2020-22298

cvss: 2.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 22%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

QNAP Systems Inc. QES 2.1.1

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Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.1	2.3	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
NVD	3.1	2.3	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
NVD	2.0	2.1	AV:L/AC:L/Au:N/C:P/I:N/A:N

Affected products

QNAP Systems Inc. QES

Classification

Weakness

CWE-209 Generation of Error Message Containing Sensitive Information
CWE-755 Improper Handling of Exceptional Conditions

References

qnap.com /zh-tw/security-advisory/qsa-20-17
vendor-advisory

Sources

CVE List CVE-2020-2505
NVD CVE-2020-2505

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