CVE-2022-25155Public exploitNetwork attack vector

Unauthenticated login via replayed password hash

Published Apr 1, 2022 · Updated Aug 3, 2024

Improper authentication in all versions of Mitsubishi Electric MELSEC iQ-F, iQ-R, Q, and L controllers allows remote attackers to log in. The Remote Password Unlock command accepts a captured password hash as the authentication secret instead of requiring the original password. Exploitation requires interception of a valid hash, and replaying it grants access to controller operations protected by the remote password.

CVSS severity5.9
Medium
EPSS probability2.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in all versions of Mitsubishi Electric MELSEC iQ-F, iQ-R, Q, and L controllers allows remote attackers to log in. The Remote Password Unlock command accepts a captured password hash as the authentication secret instead of requiring the original password. Exploitation requires interception of a valid hash, and replaying it grants access to controller operations protected by the remote password.

The record

CVE
CVE-2022-25155
Published
Apr 1, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-836, CWE-287, T1550
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 1, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P
8.1NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
5.9Mitsubishi ElectricCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
5.9JPCERT/CC JVNCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-836Use of Password Hash Instead of Password for Authentication
CWE-287Improper Authentication
T1550Use Alternate Authentication Material

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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