Is CVE-2022-33321 actively exploited?

No active exploitation of CVE-2022-33321 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2022-33321 be exploited remotely?

Yes. CVE-2022-33321 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2022-33321?

CVE-2022-33321 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2022-33321

CRITICAL

CVE-2022-33321

CWE-319Published: November 8, 2022· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Cleartext Transmission of Sensitive Information vulnerability due to the use of Basic Authentication for HTTP connections in Mitsubishi Electric consumer electronics products (PHOTOVOLTAIC COLOR MONITOR ECO-GUIDE, HEMS adapter, Wi-Fi Interface, Air Conditioning, Induction hob, Mitsubishi Electric HEMS Energy Measurement Unit, Refrigerator, Remote control with Wi-Fi Interface, BATHROOM THERMO VENTILATOR, Rice cooker, Mitsubishi Electric HEMS control adapter, Energy Recovery Ventilator, Smart Switch, Ventilating Fan, Range hood fan, Energy Measurement Unit and Air Purifier) allows a remote unauthenticated attacker to disclose information in the products or cause a denial of service (DoS) condition as a result by sniffing credential information (username and password).

The wide range of models/versions of Mitsubishi Electric consumer electronics products are affected by this vulnerability.

As for the affected product models/versions, see the Mitsubishi Electric's advisory which is listed in [References] section.

NVD Source

Technical Analysis

CVE-2022-33321 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

mitsubishielectric356 product(s)

mac-557if-e firmwaremac-557if-emac-557if-e1 firmwaremac-557if-e1pac-wf010-e firmwarepac-wf010-emac-566ifb-e firmwaremac-566ifb-emac-576if-e1 firmwaremac-576if-e1mac-567ifb-e firmwaremac-567ifb-e+344

Source: NVD CPE · 356 total CPE entries