CVE-2011-3486

CVE-2011-3486 is a medium-severity vulnerability in Beckhoff Twincat with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 50% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Description

Beckhoff TwinCAT 2.11.0.2004 and earlier allows remote attackers to cause a denial of service via a crafted request to UDP port 48899, which triggers an out-of-bounds read.

Frequently asked questions

What is CVE-2011-3486?
Beckhoff TwinCAT 2.11.0.2004 and earlier allows remote attackers to cause a denial of service via a crafted request to UDP port 48899, which triggers an out-of-bounds read.
How severe is CVE-2011-3486?
CVE-2011-3486 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-3486 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 50% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-3486?
CVE-2011-3486 primarily affects Beckhoff Twincat. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-3486?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-3486 published?
CVE-2011-3486 was published on 2011-09-16 and last updated on 2026-06-16.

References

Affected products (5)

More vulnerabilities in Beckhoff Twincat

All CVEs affecting Beckhoff Twincat →

Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities

Browse all CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities →