CVE-2026-90457Hinoki check available

Administrative credential recovery via world-readable MD5-crypt hash

Published Sep 11, 2026 · Updated Sep 11, 2026

Weak password storage in CISA Malcolm before 26.06.0 allows local users to recover the administrative password from config/auth.env. The auth_setup flow writes an MD5-crypt SFTP hash of the shared administrative password to config/auth.env with mode 0644 instead of restricting the file to its owner. Any local user or process that can read the configuration directory can crack the hash offline and use the recovered password for both the web interface and SFTP.

CVSS severityUnavailable
Unscored
EPSS probability0.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Weak password storage in CISA Malcolm before 26.06.0 allows local users to recover the administrative password from config/auth.env. The auth_setup flow writes an MD5-crypt SFTP hash of the shared administrative password to config/auth.env with mode 0644 instead of restricting the file to its owner. Any local user or process that can read the configuration directory can crack the hash offline and use the recovered password for both the web interface and SFTP.

The record

CVE
CVE-2026-90457
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
Cybersecurity and Infrastructure Security Agency (CISA)
Product
Malcolm
Classifications
T1110.002, T1552.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <v26.06.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Cybersecurity and Infrastructure Security Agency (CISA) · Malcolmversion=0 <v26.06.0

Published CVSS scores

No CVSS assessment is available in this record.

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.

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No observations available

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

Weakness, pattern, technique

T1110.002Brute Force: Password Cracking
T1552.001Unsecured Credentials: Credentials In Files

Public exploit references

No public exploit references are available in this record.

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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