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CVE-2018-19945

28
FAUCET Score

CVE-2018-19945 is a critical vulnerability affecting earlier QNAP QTS versions 4.3.4 to 4.3.6, stemming from improper pathname limitations. This allows unauthenticated attackers to rename arbitrary files on the target system, leading to high integrity and availability impacts. While QNAP has released patches, there is no public exploit code, active exploitation, or significant community discussion reported for this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.3.4, < 4.3.4.0899CPE matchmatch criteria
cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*
>= 4.3.5, < 4.3.6.0895CPE matchmatch criteria
cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.11%
Probability of exploitation in next 30 days
EPSS Percentile
62.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0111 is in the 48th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 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-20-21
Vendor Advisory