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CVE-2020-2505

15
FAUCET Score

CVE-2020-2505 is a low-severity vulnerability affecting QNAP QES operating systems, specifically fixed in versions 2.1.1 Build 20201006 and later. It allows attackers to gain sensitive information through error message generation. The CVSS score is 2.3 (LOW), indicating a local attack vector with low complexity, requiring high privileges, and resulting in low confidentiality impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or inclusion in the KEV catalog. Community discussion and media coverage are minimal, with only one mention and one article found.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.1.1CPE matchmatch criteria
cpe:2.3:a:qnap:qes:*:*:*:*:*:*:*:*
2.1.1CPE matchmatch criteria
cpe:2.3:a:qnap:qes:2.1.1:-:*:*:*:*:*:*
2.1.1CPE matchmatch criteria
cpe:2.3:a:qnap:qes:2.1.1:build_20200211:*:*:*:*:*:*
2.1.1CPE matchmatch criteria
cpe:2.3:a:qnap:qes:2.1.1:build_20200303:*:*:*:*:*:*
2.1.1CPE matchmatch criteria
cpe:2.3:a:qnap:qes:2.1.1:build_20200319:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

2.3LOW

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
0.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.29%
Probability of exploitation in next 30 days
EPSS Percentile
21.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0029 is in the 69th percentile among its peer group of 158 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

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