CVE-2015-6484: 3S-Smart CODESYS Gateway Server before 2.3.9.48 allows remote attackers to cause a denial of service (NULL poi

Q: How do I fix CVE-2015-6484?

codesys gateway server: upgrade to newer than 2.3.9.47. Exact commands for each OS are on this page.

Q: Is CVE-2015-6484 being exploited?

CVE-2015-6484 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-2015-6484 affect?

CVE-2015-6484 affects codesys gateway server. Severity is medium (CVSS 5.0). 3S-Smart CODESYS Gateway Server before 2.3.9.48 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted (1) GET or (2) POST request.

Q: How urgent is CVE-2015-6484?

Priority 38/100. No elevated risk signals yet.

Routine

MEDIUM 5.0UPGRADE

CVE-2015-6484 is a medium-severity flaw (CVSS 5.0) affecting codesys gateway server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

3S-Smart CODESYS Gateway Server before 2.3.9.48 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted (1) GET or (2) POST request.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	2.1% (top 19%)
CISA exploited list	No
Published	2015-10-25
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2015-10-25 02:59 UTCPublished CVE record published
2026-06-17 00:30 UTCUpdated Record last modified

3s-smart software solutions codesys gateway server UPGRADE

Affected: <= 2.3.9.47

Fixed in: newer than 2.3.9.47

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 2.3.9.47 (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.

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-2015-6484?

codesys gateway server: upgrade to newer than 2.3.9.47. Exact commands for each OS are on this page.

Is CVE-2015-6484 being exploited?

CVE-2015-6484 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-2015-6484 affect?

CVE-2015-6484 affects codesys gateway server. Severity is medium (CVSS 5.0). 3S-Smart CODESYS Gateway Server before 2.3.9.48 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted (1) GET or (2) POST request.

How urgent is CVE-2015-6484?

Priority 38/100. No elevated risk signals yet.

Related CVEs

CVE-2015-6460 HIGH 7.5 UPGRADE Multiple heap-based buffer overflows in 3S-Smart CODESYS Gateway Server before 2.3.9.34 allow remote attackers

References

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