Is CVE-2003-1339 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2003-1339, but active exploitation has not been confirmed.

Can CVE-2003-1339 be exploited remotely?

Yes. CVE-2003-1339 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2003-1339?

CVE-2003-1339 has a CVSS score of 10.0 (CRITICAL).

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CRITICALPOC

CVE-2003-1339

CWE-119Published: December 31, 2003· Updated: Jun 16, 2026

10.0

CVSS v3.1

Official Description

Stack-based buffer overflow in eZnet.exe, as used in eZ (a) eZphotoshare, (b) eZmeeting, (c) eZnetwork, and (d) eZshare allows remote attackers to cause a denial of service (crash) or execute arbitrary code, as demonstrated via (1) a long GET request and (2) a long operation or autologin parameter to SwEzModule.dll.

NVD Source

Technical Analysis

CVE-2003-1339 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

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-2003-1339. 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.