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CVE-2021-43734

40
FAUCET Score

CVE-2021-43734 is a high-severity directory traversal vulnerability affecting kkFileview v4.0.0, allowing unauthenticated attackers to read arbitrary files on the host system. With a CVSS score of 7.5, this vulnerability is easily exploitable over the network without user interaction and can lead to sensitive data leakage. While not listed in CISA's KEV catalog, exploit code is available via Nuclei templates, though there is currently no evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
4.0.0CPE matchmatch criteria
cpe:2.3:a:keking:kkfileview:4.0.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
10.73%
Probability of exploitation in next 30 days
EPSS Percentile
95.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
Nuclei: CVE-2021-43734 · Aug 18, 2022
This CVE's current EPSS score of 0.1073 is in the 93rd percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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

github.com / kekingcn/kkFileView/issues/304
ExploitIssue TrackingThird Party Advisory