Home
» Security vulnerabilities
» CVE-2021-43734
kkFileview v4.0.0 has arbitrary file read through a directory traversal vulnerability which may lead to sensitive file leak on related host.
NVD Status： Modified ，CVE State: published
Threat Intelligence & Risk Assessment for CVE-2021-43734
Conclusion & alert: CVE-2021-43734 is rated High Exploit Risk (73.3/100) : CVSS High severity, with high exploitation likelihood (EPSS 10.73%, 95th percentile).Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB).Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
Public exploit references (Exploit-DB) for CVE-2021-43734
EDB-ID
Source
Kind
Published
Link
—
nvd_ref
exploit_tag
Exploit-DB ↗
Exploit prediction scoring system (EPSS) score for CVE-2021-43734
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
#
Date
Old EPSS score
New EPSS score
Delta (New - Old)
1
2026-06-15
77.36%
10.73%
-66.63%
2
2026-05-06
81.93%
77.36%
-4.57%
3
2026-02-27
—
81.93%
—
Full EPSS history
(47 records total)
Common vulnerability scoring system (CVSS) metrics for CVE-2021-43734
CVSS metrics for this CVE.
Base score
Version
Severity
Vector
Exploitability
Impact
Score source
7.5
3.1
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
3.9
3.6
[email protected]
5.0
2.0
MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N
Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
10.0
2.9
[email protected]
Weakness enumeration for CVE-2021-43734
Affected software / configurations for CVE-2021-43734
Vendor
Product
Version
Raw CPE
keking
kkfileview
4.0.0
cpe:2.3:a:keking:kkfileview:4.0.0:*:*:*:*:*:*:*
References for CVE-2021-43734
cvelogic
Threat Intelligence