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Vulnerability record · CVE-2015-9267 · published 1 October 2018

CVE-2015-9267: Nullsoft scriptable install system improper privilege management vulnerability

Nullsoft · Nullsoft Scriptable Install System

Nullsoft Scriptable Install System (NSIS) before 2.49 uses temporary folder locations that allow unprivileged local users to overwrite files. This allows a local attack in which either a plugin or the uninstaller can be replaced by a Trojan horse program.

5.5 CVSS 3.1 Medium EPSS 0.39% · top 69.9% CWE-269 · Improper privilege management
5.5CVSS 3.1 base score, v2 3.6
0.39%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Nullsoft Scriptable Install System (NSIS) before 2.49 uses temporary folder locations that allow unprivileged local users to overwrite files. This allows a local attack in which either a plugin or the uninstaller can be replaced by a Trojan horse program.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://jvn.jp/en/jp/JVN68418039/index.html Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/11/msg00041.html Mailing ListThird Party Advisory
https://sourceforge.net/p/nsis/bugs/1125/ ExploitIssue TrackingPatchThird Party Advisory
http://jvn.jp/en/jp/JVN68418039/index.html Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/11/msg00041.html Mailing ListThird Party Advisory
https://sourceforge.net/p/nsis/bugs/1125/ ExploitIssue TrackingPatchThird Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2015-9267), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.