Which products and versions are affected by CVE-2011-5227?

Affected: Netsight (Enterasys). The full list is in the CVE brief.

Is CVE-2011-5227 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2011-5227 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2011-5227?

Public exploit code is available.

Is there a fix for CVE-2011-5227?

Fixed versions are available, including Netsight 4.1.0.79.

How urgently should CVE-2011-5227 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2011-5227

CriticalPublic exploit

Stack-based buffer overflow in the Syslog service (nssyslogd.exe) in Enterasys Network Management Suite (NMS) before 4.1.0.80 allows remote attackers to execute arbitrary code via a long PRIO field in a message to UDP port 514.

Published Oct 25, 2012 · Updated Apr 28, 2026

Key Facts

Patch immediately

CVE-2011-5227 is a critical-severity vulnerability (CVSS 10.0 v2) affecting Netsight (Enterasys).
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 77% probability of exploitation in the next 30 days.
Fixed versions are available, including Netsight 4.1.0.79.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v2

10.0

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

EPSS (30-day exploit likelihood)

77%

Higher than 99.5% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2011-5227 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

Affected Products

2 affected entries in total

Product	Affected versions	Fixed in
NetsightEnterasys	See advisory	4.1.0.79

Patched Releases

Netsight

4.1.0.79

Timeline

Publicly disclosed
Oct 25, 2012
Last updated
Apr 28, 2026

Weakness Type

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

3 more references in the full CVE brief

FAQ

Common Questions.

Stack-based buffer overflow in the Syslog service (nssyslogd.exe) in Enterasys Network Management Suite (NMS) before 4.1.0.80 allows remote attackers to execute arbitrary code via a long PRIO field in a message to UDP port 514.
Affected: Netsight (Enterasys). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Netsight 4.1.0.79.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

Is CVE-2011-5227 Running On Your Attack Surface?

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