Is CVE-2014-9456 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2014-9456, but active exploitation has not been confirmed.

Can CVE-2014-9456 be exploited remotely?

Yes. CVE-2014-9456 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2014-9456?

CVE-2014-9456 has a CVSS score of 10.0 (CRITICAL).

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CRITICALPOC

CVE-2014-9456

CWE-119Published: January 2, 2015· Updated: Jun 17, 2026

10.0

CVSS v3.1

Official Description

Buffer overflow in NotePad++ 6.6.9 allows remote attackers to have unspecified impact via a long Time attribute in an Event element in an XML file. NOTE: this issue was originally incorrectly mapped to CVE-2014-1004; see CVE-2014-1004 for more information.

NVD Source

Technical Analysis

CVE-2014-9456 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-2014-9456. 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.