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Fencer Vulns
critical 9.8

CVE-2021-22820 json

A CWE-614 Insufficient Session Expiration vulnerability exists that could allow an attacker to maintain an unauthorized access over a hijac…

published 2022-01-28 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-9955

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits
0
none known

Summary

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)

Patch / fix

  • 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

Exploit prediction

1.08% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-613 DEPRECATED: Insufficient Session Expiration

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.