CVE-2024-41643Public exploit

Unauthenticated root shell via cshell task termination

Published Mar 26, 2025 · Updated Mar 27, 2025

Authentication bypass in Arris NVG443B firmware 9.3.0h3d36 allows physically proximate attackers to obtain a root shell. The /bin/cshell login handler erroneously grants root access when a ^e command over the UART interface terminates the sdb task. Physical access to the router's UART interface is required; successful exploitation exposes the filesystem and permits arbitrary code execution and device modification.

CVSS severity6.8
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Arris NVG443B firmware 9.3.0h3d36 allows physically proximate attackers to obtain a root shell. The /bin/cshell login handler erroneously grants root access when a ^e command over the UART interface terminates the sdb task. Physical access to the router's UART interface is required; successful exploitation exposes the filesystem and permits arbitrary code execution and device modification.

The record

CVE
CVE-2024-41643
Published
Mar 26, 2025
Updated
Mar 27, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-94, T1059
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 27, 2025Record 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 vectorphysical
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.8CISA-ADPCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1059Command and Scripting Interpreter

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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