CVE-2012-4705: Directory traversal vulnerability in 3S CODESYS Gateway-Server before 2.3.9.27 allows remote attackers to exec

Q: How do I fix CVE-2012-4705?

codesys gateway-server: upgrade to newer than 2.3.9.20. Exact commands for each OS are on this page.

Q: Is CVE-2012-4705 being exploited?

CVE-2012-4705 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2012-4705 affect?

CVE-2012-4705 affects codesys gateway-server. Severity is high (CVSS 10.0). Directory traversal vulnerability in 3S CODESYS Gateway-Server before 2.3.9.27 allows remote attackers to execute arbitrary code via vectors involving a crafted pathname.

Q: How urgent is CVE-2012-4705?

Priority 65/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference

This week

HIGH 10.0UPGRADE

CVE-2012-4705 is a high-severity flaw (CVSS 10.0) affecting codesys gateway-server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Directory traversal vulnerability in 3S CODESYS Gateway-Server before 2.3.9.27 allows remote attackers to execute arbitrary code via vectors involving a crafted pathname.

Why this priority

Critical severity
EPSS top 1%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (High)
EPSS exploit chance	64.9% (top 1%)
CISA exploited list	No
Weakness	CWE-22
Published	2013-02-24
Last modified	2026-06-16

Publisher (CNA): ICS-CERT · Vendor: 3s-software

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2013-02-24 11:48 UTCPublished CVE record published
2026-06-16 23:45 UTCUpdated Record last modified

3s-software codesys gateway-server UPGRADE

Affected: <= 2.3.9.20 · 2.3.5.1 · 2.3.5.2 · 2.3.5.3 · 2.3.6.0 · 2.3.7.0 · 2.3.8.0 · 2.3.8.1

Fixed in: newer than 2.3.9.20

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy codesys-gateway-server || rpm -q codesys-gateway-server || codesys-gateway-server --version

2. UPGRADE to newer than 2.3.9.20 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade codesys-gateway-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade codesys-gateway-server

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: CADA 3S CoDeSys Gateway Server - Directory Traversal (Metasploit)
Metasploit: SCADA 3S CoDeSys Gateway Server Directory Traversal

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-2012-4705?

codesys gateway-server: upgrade to newer than 2.3.9.20. Exact commands for each OS are on this page.

Is CVE-2012-4705 being exploited?

CVE-2012-4705 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-2012-4705 affect?

CVE-2012-4705 affects codesys gateway-server. Severity is high (CVSS 10.0). Directory traversal vulnerability in 3S CODESYS Gateway-Server before 2.3.9.27 allows remote attackers to execute arbitrary code via vectors involving a crafted pathname.

How urgent is CVE-2012-4705?

Priority 65/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2013-2781 HIGH 10.0 DOWNGRADE Use-after-free vulnerability in the server application in 3S CODESYS Gateway 2.3.9.27 allows remote attackers
CVE-2012-4708 HIGH 10.0 UPGRADE Stack-based buffer overflow in 3S CODESYS Gateway-Server before 2.3.9.27 allows remote attackers to execute ar
CVE-2012-4707 HIGH 10.0 UPGRADE 3S CODESYS Gateway-Server before 2.3.9.27 allows remote attackers to execute arbitrary code via vectors that t
CVE-2012-4706 HIGH 7.8 UPGRADE Integer signedness error in 3S CODESYS Gateway-Server before 2.3.9.27 allows remote attackers to cause a denia
CVE-2012-4704 HIGH 10.0 UPGRADE Array index error in 3S CODESYS Gateway-Server before 2.3.9.27 allows remote attackers to execute arbitrary co

References

← Back to latest CVEs