CVE-2022-21170

Improper check for certificate revocation in i-FILTER Ver.10.45R01 and earlier, i-FILTER Ver.9.50R10 and earlier, i-FILTER Browser & Cloud MultiAgent for Windows Ver.4.93R04 and earlier, and D-SPA (Ver.3 / Ver.4) using i-FILTER allows a remote unauthenticated attacker to conduct a man-in-the-middle attack and eavesdrop on an encrypted communication.

Published: 2022-03-10 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-21170 is rated Low Risk (35.1/100): CVSS Low severity, with medium exploitation likelihood (EPSS 0.95%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2022-21170

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 0.41% 0.95% +0.54%
2 2025-04-13 0.52% 0.41% -0.11%
3 2025-03-30 — 0.52% —

Full EPSS history (15 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-21170

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
3.7 3.1 LOW
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/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:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
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:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 1.4 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/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:M)
Exploitation needs some favorable conditions, but not exceptional ones.
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.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2022-21170

Affected software / configurations for CVE-2022-21170

Vendor Product Version Raw CPE
daj i-filter_browser_\&_cloud_multiagent <= 4.93r04 cpe:2.3:a:daj:i-filter_browser_\&_cloud_multiagent:*:*:*:*:*:windows:*:*
daj i-filter <= 9.50r10 cpe:2.3:a:daj:i-filter:*:*:*:*:*:*:*:*
daj i-filter >= 10.0, <= 10.45r01 cpe:2.3:a:daj:i-filter:*:*:*:*:*:*:*:*

References for CVE-2022-21170

URL Tags
https://download.daj.co.jp/user/dspa/V3/ Permissions Required Vendor Advisory
https://download.daj.co.jp/user/dspa/V4/ Permissions Required Vendor Advisory
https://download.daj.co.jp/user/ifb/ Permissions Required Vendor Advisory
https://download.daj.co.jp/user/ifilter/V10/ Permissions Required Vendor Advisory
https://download.daj.co.jp/user/ifilter/V9/ Permissions Required Vendor Advisory
https://jvn.jp/en/jp/JVN33214411/index.html Third Party Advisory VDB Entry
cvelogic Threat Intelligence