CVE-2021-22820

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-01-28 · updated 2026-06-17
Weakness: CWE-613

Description

A CWE-614 Insufficient Session Expiration vulnerability exists that could allow an attacker to maintain an unauthorized access over a hijacked session to the charger station web server even after the legitimate user account holder has changed his password. 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)

Affected products

Schneider-Electric Evlink City Evc1S22P4 Firmware: before 3.4.0.2 — fixed in 3.4.0.2
Schneider-Electric Evlink City Evc1S7P4 Firmware: before 3.4.0.2 — fixed in 3.4.0.2
Schneider-Electric Evlink Parking Evf2 Firmware: before 3.4.0.2 — fixed in 3.4.0.2
Schneider-Electric Evlink Parking Evp2Pe Firmware: before 3.4.0.2 — fixed in 3.4.0.2
Schneider-Electric Evlink Parking Evw2 Firmware: before 3.4.0.2 — fixed in 3.4.0.2
Schneider-Electric Evlink Smart Wallbox Evb1A Firmware: before 3.4.0.2 — fixed in 3.4.0.2

How to fix

Upgrade to a fixed version: Schneider-Electric Evlink City Evc1S22P4 Firmware 3.4.0.2; Schneider-Electric Evlink City Evc1S7P4 Firmware 3.4.0.2; Schneider-Electric Evlink Parking Evf2 Firmware 3.4.0.2; Schneider-Electric Evlink Parking Evp2Pe Firmware 3.4.0.2; Schneider-Electric Evlink Parking Evw2 Firmware 3.4.0.2; Schneider-Electric Evlink Smart Wallbox Evb1A Firmware 3.4.0.2. Check the vendor advisory for mitigations.

References

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