Is CVE-2011-5033 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2011-5033, but active exploitation has not been confirmed.

Can CVE-2011-5033 be exploited remotely?

No. CVE-2011-5033 requires local access to exploit.

What is the CVSS score of CVE-2011-5033?

CVE-2011-5033 has a CVSS score of 4.4 (MEDIUM).

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MEDIUMPOC

CVE-2011-5033

CWE-119Published: December 29, 2011· Updated: Jun 16, 2026

4.4

CVSS v3.1

Official Description

Stack-based buffer overflow in CFS.c in ConfigServer Security & Firewall (CSF) before 5.43, when running on a DirectAdmin server, allows local users to cause a denial of service (crash) via a long string in an admin.list file.

NVD Source

Technical Analysis

CVE-2011-5033 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A proof-of-concept (PoC) exploit exists for CVE-2011-5033. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.