CVE-2023-29059: 3CX DesktopApp through 18.12.416 has embedded malicious code, as exploited in the wild in March 2023

This month

HIGH 7.8DOWNGRADEDOWNGRADE

CVE-2023-29059 is a high-severity flaw (CVSS 7.8) affecting 3cx, 3cx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

3CX DesktopApp through 18.12.416 has embedded malicious code, as exploited in the wild in March 2023. This affects versions 18.12.407 and 18.12.416 of the 3CX DesktopApp Electron Windows application shipped in Update 7, and versions 18.11.1213, 18.12.402, 18.12.407, and 18.12.416 of the 3CX DesktopApp Electron macOS application.

Why this priority

High severity
EPSS top 9%: very likely to be exploited
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	4.4% (top 9%)
CISA exploited list	No
Published	2023-03-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: 3cx

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-03-30 17:15 UTCPublished CVE record published
2026-06-17 05:49 UTCUpdated Record last modified

3cx 3cx DOWNGRADE

Affected: 18.11.1213 · 18.12.402 · 18.12.407 · 18.12.416

Fixed in: no fixed release known

Safe to downgrade to: a release before 18.11.1213

1. Check installed version

apt-cache policy 3cx || rpm -q 3cx || 3cx --version

2. No fixed release: DOWNGRADE to a release before 18.11.1213 (Debian / Ubuntu)

apt-cache madison 3cx sudo apt install 3cx=<VERSION_BEFORE_18.11.1213> sudo apt-mark hold 3cx

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list 3cx sudo dnf downgrade 3cx-<VERSION_BEFORE_18.11.1213> sudo dnf versionlock add 3cx

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

3cx 3cx DOWNGRADE

Affected: 18.12.407 · 18.12.416

Fixed in: no fixed release known

Safe to downgrade to: a release before 18.12.407

1. Check installed version

apt-cache policy 3cx || rpm -q 3cx || 3cx --version

2. No fixed release: DOWNGRADE to a release before 18.12.407 (Debian / Ubuntu)

apt-cache madison 3cx sudo apt install 3cx=<VERSION_BEFORE_18.12.407> sudo apt-mark hold 3cx

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list 3cx sudo dnf downgrade 3cx-<VERSION_BEFORE_18.12.407> sudo dnf versionlock add 3cx

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-29059?

3cx: downgrade or apply the listed mitigation; 3cx: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-29059 being exploited?

CVE-2023-29059 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-29059 affect?

CVE-2023-29059 affects 3cx, 3cx. Severity is high (CVSS 7.8). 3CX DesktopApp through 18.12.416 has embedded malicious code, as exploited in the wild in March 2023. This affects versions 18.12.407 and 18.12.416 of the 3CX DesktopApp Electron Windows application shipped in Update 7, and versions 18.11.1

How urgent is CVE-2023-29059?

Priority 55/100. High severity; EPSS top 9%: very likely to be exploited; Public exploit reference

Software pages

Windows vulnerabilities · macOS vulnerabilities · Electron vulnerabilities

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References

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