CVE-2021-22820

Name: CVE-2021-22820
Creator: NVD / NIST
Published: 2022-01-28T20:15:10.463+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.08%

Last modified Jun 17, 2026

CVE-2021-22820 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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). EPSS estimates a 1.08% chance of exploitation in the next 30 days.

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)

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

1.08%

61.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-613

Affected Software

Vendor	Product	Versions
Schneider-Electric	Evlink City Evc1s22p4 Firmware	< 3.4.0.2
Schneider-Electric	Evlink City Evc1s7p4 Firmware	< 3.4.0.2
Schneider-Electric	Evlink Parking Evw2 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 Smart Wallbox Evb1a Firmware	< 3.4.0.2

References

https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-348-02Patch, Vendor Advisory
https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-348-02Patch, Vendor Advisory

Timeline

Published: Jan 28, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-22820?

How severe is CVE-2021-22820?

CVE-2021-22820 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.08% probability of exploitation in the next 30 days.

How do I fix CVE-2021-22820?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-22820?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST