CVE-2021-22819

A CWE-1021 Improper Restriction of Rendered UI Layers or Frames vulnerability exists that could cause unintended modifications of the product settings or user accounts when deceiving the user to use the web interface rendered within iframes. Affected Products: EVlink City EVC1S22P4 / EVC1S7P4 (All versions prior to R8 V3.4.0.2 ), EVlink Parking EVW2 / EVF2 / EVP2PE (All versions prior to R8 V3.4.0.2), and EVlink Smart Wallbox EVB1A (All versions prior to R8 V3.4.0.2)

Published: 2022-01-28 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-22819 is rated Low Risk (33.4/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.65%). 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-2021-22819

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 2026-06-19 0.64% 0.65% +0.01%
2 2026-06-15 0.21% 0.64% +0.43%
3 2025-03-17 — 0.21% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-22819

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/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:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 1.4 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/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:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2021-22819

Affected software / configurations for CVE-2021-22819

Vendor Product Version Raw CPE
schneider-electric evlink_city_evc1s22p4_firmware < 3.4.0.2 cpe:2.3:o:schneider-electric:evlink_city_evc1s22p4_firmware:*:*:*:*:*:*:*:*
schneider-electric evlink_city_evc1s7p4_firmware < 3.4.0.2 cpe:2.3:o:schneider-electric:evlink_city_evc1s7p4_firmware:*:*:*:*:*:*:*:*
schneider-electric evlink_parking_evw2_firmware < 3.4.0.2 cpe:2.3:o:schneider-electric:evlink_parking_evw2_firmware:*:*:*:*:*:*:*:*
schneider-electric evlink_parking_evf2_firmware < 3.4.0.2 cpe:2.3:o:schneider-electric:evlink_parking_evf2_firmware:*:*:*:*:*:*:*:*
schneider-electric evlink_parking_evp2pe_firmware < 3.4.0.2 cpe:2.3:o:schneider-electric:evlink_parking_evp2pe_firmware:*:*:*:*:*:*:*:*
schneider-electric evlink_smart_wallbox_evb1a_firmware < 3.4.0.2 cpe:2.3:o:schneider-electric:evlink_smart_wallbox_evb1a_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-22819

cvelogic Threat Intelligence