CVE-2023-29059Known exploitation

Arbitrary code execution via trojanized signed installers

Published Mar 30, 2023 · Updated May 5, 2025

Embedded malicious code in affected 3CX DesktopApp builds allows attackers to execute downloaded payloads through trojanized installers. The signed Windows and macOS packages run the SUDDENICON downloader, obtain command-and-control addresses from encrypted GitHub icon files, and fetch ICONICSTEALER. Execution requires an affected package to be installed or updated; the resulting third stage steals browser information and application configuration data.

CVSS severity7.8
High
EPSS probability4.37%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Embedded malicious code in affected 3CX DesktopApp builds allows attackers to execute downloaded payloads through trojanized installers. The signed Windows and macOS packages run the SUDDENICON downloader, obtain command-and-control addresses from encrypted GitHub icon files, and fetch ICONICSTEALER. Execution requires an affected package to be installed or updated; the resulting third stage steals browser information and application configuration data.

The record

CVE
CVE-2023-29059
Published
Mar 30, 2023
Updated
May 5, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-506, CAPEC-636, CAPEC-442, CAPEC-448, T1195.002
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 30, 2023CVE publishedPublication date reported by the CVE source.
  2. May 5, 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 vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/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.

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)
Vectorlocal
Privilegesauthenticated
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-506Embedded Malicious Code
CAPEC-636Hiding Malicious Data or Code within Files
CAPEC-442Infected Software
CAPEC-448Embed Virus into DLL
T1195.002Compromise Software Supply Chain

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.

Reported exploitation

Technologies

Your stack

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Your stack

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