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CVE-2018-0721

25
FAUCET Score

CVE-2018-0721 is a buffer overflow vulnerability affecting QNAP QTS Network Attached Storage (NAS) devices, specifically versions 4.2.6 (build 20180711 and prior), 4.3.3 (build 20180725 and prior), and 4.3.4 (build 20180710 and prior). This flaw allows an authenticated, remote attacker to execute arbitrary code with limited impact on confidentiality and availability, but high impact on integrity, as indicated by its CVSS score of 7.7 (High). There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
4.2.6CPE matchmatch criteria
cpe:2.3:o:qnap:qts:4.2.6:*:*:*:*:*:*:*
4.3.3CPE matchmatch criteria
cpe:2.3:o:qnap:qts:4.3.3:*:*:*:*:*:*:*
4.3.4CPE matchmatch criteria
cpe:2.3:o:qnap:qts:4.3.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.7HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
HIGH
Availability Impact
LOW
Exploitability Score
1.8
Impact Score
5.3
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.55%
Probability of exploitation in next 30 days
EPSS Percentile
72.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0155 is in the 68th percentile among its peer group of 1,162 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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/nas-201809-20
Vendor Advisory