CVE-2024-21824

Administrator impersonation via captured session cookie

Published Mar 18, 2024 · Updated Nov 7, 2024

Improper authentication in Brother Web Based Management allows attackers to impersonate an administrator from the adjacent network. Web Based Management accepts a captured administrator session cookie as authentication, allowing its holder to enter the server configuration interface. The attacker must reach the device and obtain the cookie through network interception or browser compromise.

CVSS severity5.3
Medium
EPSS probability0.34%
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 Brother Web Based Management allows attackers to impersonate an administrator from the adjacent network. Web Based Management accepts a captured administrator session cookie as authentication, allowing its holder to enter the server configuration interface. The attacker must reach the device and obtain the cookie through network interception or browser compromise.

The record

CVE
CVE-2024-21824
Published
Mar 18, 2024
Updated
Nov 7, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-306, CWE-287, T1550.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 7, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.3JPCERT/CC and IPACVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
5.3CISA-ADPCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
2.9JPCERT/CC and IPAAV:A/AC:M/Au:N/C:P/I:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
CWE-287Improper Authentication
T1550.004Web Session Cookie

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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