CVE-2015-9267: Nullsoft Scriptable Install System (NSIS) before 2.49 uses temporary folder locations that allow unprivileg...

Security readout for executives and security teams

NSIS before 2.49 used temporary folder locations in a way that could let a local unprivileged user replace installer plugins or uninstallers with a Trojan program. The issue requires local access, so urgency is lower than a remote compromise, but it matters for build systems, shared workstations, and software distribution workflows. Exposure is most likely where NSIS before 2.49 is installed or used to create installers, especially on multi-user systems or build environments. The CVE affected product metadata is incomplete in the bundle, so confirm exposure by inventorying NSIS versions rather than assuming all packaged applications are affected. Prioritize remediation on build servers, release systems, and shared developer machines. The business risk is mainly installer tampering and trust damage, not remote network compromise. Because evidence is incomplete and no active exploitation is cited, handle it through normal vulnerability management unless vulnerable NSIS is present in release workflows. Mitigation focus: Upgrade NSIS to 2.49 or later where NSIS is installed or used.; Apply Debian or other vendor security updates for packaged NSIS installations.; Review build systems and shared hosts for vulnerable NSIS versions..

Prepared

Jun 7, 2026, 05:16 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.