Is CVE-2021-22731 actively exploited?

No active exploitation of CVE-2021-22731 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-22731 be exploited remotely?

Yes. CVE-2021-22731 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-22731?

CVE-2021-22731 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2021-22731

CRITICAL

CVE-2021-22731

CWE-640Published: May 26, 2021· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Weak Password Recovery Mechanism for Forgotten Password vulnerability exists on Modicon Managed Switch MCSESM* and MCSESP* V8.21 and prior which could cause an unauthorized password change through HTTP / HTTPS when basic user information is known by a remote attacker.

NVD Source

Technical Analysis

CVE-2021-22731 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected Vendors & Products

schneider-electric32 product(s)

mcsesp083f23g0 firmwaremcsesp083f23g0mcsesp083f23g0t firmwaremcsesp083f23g0tmcsesm043f23f0 firmwaremcsesm043f23f0mcsesm053f1cu0 firmwaremcsesm053f1cu0mcsesm063f2cu0 firmwaremcsesm063f2cu0mcsesm053f1cs0 firmwaremcsesm053f1cs0+20

Source: NVD CPE · 32 total CPE entries