CVE-2021-22727

Name: CVE-2021-22727
Creator: NVD / NIST
Published: 2021-07-21T15:15:14.617+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.40%

Last modified Jun 17, 2026

CVE-2021-22727 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A CWE-331: Insufficient Entropy vulnerability exists in EVlink City (EVC1S22P4 / EVC1S7P4 all versions prior to R8 V3.4.0.1), EVlink Parking (EVW2 / EVF2 / EV.2 all versions prior to R8 V3.4.0.1), and EVlink Smart Wallbox (EVB1A all versions prior to R8 V3.4.0.1 ) that could allow an attacker to gain unauthorized access to the charging station web server. EPSS estimates a 1.40% chance of exploitation in the next 30 days.

Description

A CWE-331: Insufficient Entropy vulnerability exists in EVlink City (EVC1S22P4 / EVC1S7P4 all versions prior to R8 V3.4.0.1), EVlink Parking (EVW2 / EVF2 / EV.2 all versions prior to R8 V3.4.0.1), and EVlink Smart Wallbox (EVB1A all versions prior to R8 V3.4.0.1 ) that could allow an attacker to gain unauthorized access to the charging station web server

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

1.40%

69.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-331

Affected Software

Vendor	Product	Versions
Schneider-Electric	Evlink City Evc1s22p4 Firmware	< r8_v3.4.0.1
Schneider-Electric	Evlink City Evc1s7p4 Firmware	< r8_v3.4.0.1
Schneider-Electric	Evlink Parking Evw2 Firmware	< r8_v3.4.0.1
Schneider-Electric	Evlink Parking Evf2 Firmware	< r8_v3.4.0.1
Schneider-Electric	Evlink Parking Ev.2 Firmware	< r8_v3.4.0.1
Schneider-Electric	Evlink Smart Wallbox Evb1a Firmware	< r8_v3.4.0.1

References

http://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-194-06Vendor Advisory
http://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-194-06Vendor Advisory

Timeline

Published: Jul 21, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-22727?

How severe is CVE-2021-22727?

CVE-2021-22727 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.40% probability of exploitation in the next 30 days.

How do I fix CVE-2021-22727?

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-2021-22727?

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

Scan your code now

Source: NVD / NIST