CVE-2026-90451

Use of Default Credentials in Malcolm

MEDIUM
5.9
CVSS Score
Published: September 11, 2026 at 09:50 PM UTC
Updated: October 2, 2026 at 10:16 PM UTC
2 products affected across 2 vendorsMalcolmMalcolm

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Severity
MEDIUM5.9
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

An example environment-configuration file ships with a fixed, publicly-known secret value used to sign authentication cookies for a bundled packet-analysis component. A deployment that copies this example file into active configuration without running the setup routine that regenerates the value will use the known default, allowing an attacker aware of the default to forge valid authentication cookies for that component.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

All versions
v < v26.06.0
Vendor states this is fixed in v26.06.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.9MEDIUMicscert
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-1392

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