CVE-2024-36445Public exploitNetwork attack vector

Unauthenticated root shell via credential-free Telnet

Published Aug 22, 2024 · Updated Aug 22, 2024

Missing authentication in Swissphone DiCal-RED 4009 allows remote attackers to obtain an interactive root shell through Telnet. The TCP port 23 Telnet service opens a Linux BusyBox shell as root without requesting credentials or performing an authentication check. Any network host that can reach the service can execute commands with full device privileges; no user interaction or prior account is required.

CVSS severity9.8
Critical
EPSS probability0.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Swissphone DiCal-RED 4009 allows remote attackers to obtain an interactive root shell through Telnet. The TCP port 23 Telnet service opens a Linux BusyBox shell as root without requesting credentials or performing an authentication check. Any network host that can reach the service can execute commands with full device privileges; no user interaction or prior account is required.

The record

CVE
CVE-2024-36445
Published
Aug 22, 2024
Updated
Aug 22, 2024
Vendor
Swissphone
Product
DiCal-RED
Classifications
CWE-306, T1059.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 22, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 22, 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?

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

  1. Affected versionversion=0 <*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Swissphone · DiCal-REDversion=0 <*

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1059.004Command and Scripting Interpreter: Unix Shell

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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