Is CVE-2009-1516 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2009-1516, but active exploitation has not been confirmed.

Can CVE-2009-1516 be exploited remotely?

Yes. CVE-2009-1516 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2009-1516?

CVE-2009-1516 has a CVSS score of 7.5 (HIGH).

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HIGHPOC

CVE-2009-1516

CWE-119Published: May 4, 2009· Updated: Jun 16, 2026

7.5

CVSS v3.1

Official Description

Stack-based buffer overflow in the IceWarpServer.APIObject ActiveX control in api.dll in IceWarp Merak Mail Server 9.4.1 might allow context-dependent attackers to execute arbitrary code via a large value in the second argument to the Base64FileEncode method, as possibly demonstrated by a web application that accepts untrusted input for this method.

NVD Source

Technical Analysis

CVE-2009-1516 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-2009-1516. 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.