9.8

CVE-2021-22727: schneider-electric evlink_city_evc1s22p4_firmware Insufficient Entropy

CVSS: 9.8v3.1CriticalModified
Published 21-07-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-22727 is a critical (CVSS 9.8) Insufficient Entropy vulnerability in schneider-electric evlink_city_evc1s22p4_firmware. EPSS estimates a 1.40% chance of exploitation in the next 30 days, higher than 72.1% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
1.40%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 21-07-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

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

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

1.40%

Chance of exploitation in the next 30 days

Percentile

72%

Versus all other CVEs

30-day change

0.00 pp

From 1.40% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.40%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Schneider-electric6 products

1 vendor · 6 products

References

1 links