CVE-2026-54758

highpriority · track · 0EPSS 0.002 · 9 %ileDEEU
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.19% (9th) EPSS
CVSS 7.8 · high
Is it mine?
3 products
Check your exposure
Who says so?
2 sources
enisa_euvd · cert_bund

EPSS · scored 2026-10-27

Notepad++ is a free and open-source source code editor. Prior to 8.9.7, the expandNppEnvironmentStrs function in PowerEditor/src/WinControls/StaticDialog/RunDlg/RunDlg.cpp copies a Notepad++ variable name between $( and ) into the fixed-size wchar_t str[MAX_PATH] stack buffer without bounding the m loop index, allowing a name of 260 or more characters to corrupt adjacent stack data, terminate the process through __report_gsfailure, and potentially execute code. This issue is fixed in version 8.9.7.

01

cvss

Technical severity, 0–10. One row per scoring source.

7.8
010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · ENISA EU
v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · security-advisories@github.comexploitability 1.8 · impact 5.9
v3.17.1highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-121USCWE-787US
04

affected products (3)

Products and version ranges known to be affected.

05

advisories (1)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2026-2312Notepad++: Mehrere SchwachstellenDeutsch2026-07-13csaf · cert_bundDE

    Ein Angreifer kann mehrere Schwachstellen in Notepad++ ausnutzen, um beliebigen Programmcode auszuführen, um Informationen offenzulegen, um Dateien zu manipulieren, und um Sicherheitsvorkehrungen zu umgehen.

06

also known as (1)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

enisa_euvdcert_bundNVDCVE.orgMITRE
published 2026-08-17modified 2026-08-17
08

references (6)

External citations — patches, advisories, analysis.

scry

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