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CVE-2013-2781

26
FAUCET Score

CVE-2013-2781 describes a critical use-after-free vulnerability in the 3S CODESYS Gateway server application, version 2.3.9.27. This flaw, with a CVSS score of 10.0, allows unauthenticated remote attackers to trigger a denial of service or potentially execute arbitrary code with high impact on confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, and community discussion is minimal, its high FAUCET Risk Score of 84/100 indicates significant theoretical risk.

Impacted Technologies

VendorProductVersion(s)CPE
2.3.9.27CPE matchmatch criteria
cpe:2.3:a:3s-software:codesys_gateway-server:2.3.9.27:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

AV:N/AC:L/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.80%
Probability of exploitation in next 30 days
EPSS Percentile
88.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0380 is in the 80th percentile among its peer group of 51,466 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (3)

envoyvendor investigatingvia llm_extracted
mozillavendor investigatingvia llm_extracted
pythonvendor investigatingvia llm_extracted

Vendor Advisories (3)

mozillallm-mozilla-5ce7c2e400fd4f4aCRITICAL

3S CoDeSys Gateway Unspecified Use-after-free Arbitrary Code Execution

May 22, 2013
envoyllm-envoy-96d90ed211543966CRITICAL

3S CoDeSys Gateway Unspecified Use-after-free Arbitrary Code Execution

May 22, 2013
pythonllm-python-69e563923939b93cCRITICAL

3S CoDeSys Gateway Unspecified Use-after-free Arbitrary Code Execution

May 22, 2013

References

ics-cert.us-cert.gov / advisories/ICSA-13-142-01
US Government Resource