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CVE-2020-2499

19
FAUCET Score

CVE-2020-2499 describes a hard-coded password vulnerability impacting earlier versions of QNAP QES. This flaw allows attackers to log in using a pre-set password, potentially leading to full compromise of the affected system. With a CVSS score of 7.2 (High), the vulnerability is network-exploitable with low attack complexity, requiring high privileges but resulting in high impact to confidentiality, integrity, and availability. While QNAP has released fixes in QES 2.1.1 Build 20200515 and later, there is no public exploit code (Metasploit, Nuclei, ExploitDB) and it is not listed in CISA's KEV catalog, suggesting no active exploitation. Community discussion and media coverage are minimal, indicating limited public attention.

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

6.3MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.1
Impact Score
4.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.36%
Probability of exploitation in next 30 days
EPSS Percentile
68.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0136 is in the 60th percentile among its peer group of 5,537 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.3 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 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-20-19
Vendor Advisory