CVE-2023-40031

highpriority · track · 41EPSS 0.005 · 44 %ileexploit · PoCDEEURUUS
grimoire priorityP1 · Urgent
Exploitable?
Public exploit
1 exploit · PoC
Likely / severe?
0.52% (44th) EPSS
CVSS 7.8 · high
Is it mine?
6 products
Check your exposure
Who says so?
6 sources
cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

Notepad++ is a free and open-source source code editor. Versions 8.5.6 and prior are vulnerable to heap buffer write overflow in `Utf8_16_Read::convert`. This issue may lead to arbitrary code execution. As of time of publication, no known patches are available in existing versions of Notepad++.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • Fixedtrumpf_psirt

    Please download the replacement tool [here](https://trumpf.sharepoint.com/sites/SCC%20Software%20Download%20Portal/Shared%20Documents/Forms/AllItems.aspx?id=%2Fsites%2FSCC%20Software%20Download%20Portal%2FShared%20Documents%2FOutgoing%2DFiles%2FSecurity%2FReplaceTools%5FPR501709&p=true&fromShare=true&ga=1).

  • Mitigationtrumpf_psirt

    For additional questions please contact your TRUMPF Service with the PR number 501709.

02

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:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9
v3.17.8highAV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU
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
v3.17.4highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Psecondary · CVSS-BT (t0sche)
v3.17.8highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · TRUMPF PSIRT
03

ssvc

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

Exploitation: poc · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-120USCWE-120USCWE-120USCWE-122US
05

exploits (1)

Public proof-of-concept and weaponised exploit code.

06

affected products (6)

Products and version ranges known to be affected.

07

advisories (2)

Vendor and ecosystem advisories describing this.

  • VDE-2024-003TRUMPF: Multiple products include a vulnerable version of Notepad++2024-01-23csaf · trumpf_psirtDE

    The TRUMPF products that are listed above contain a vulnerable version of Notepad++. This version isbeing installed for support purposes only, so there is no danger of triggering this vulnerability inNotepad++ during normal operations. Nevertheless, TRUMPF recommends mitigation of thisvulnerability.When editing a specially crafted file containing UTF-8 characters in Notepad++ (Versions up to 8.5.6) and converting that file to UTF-16, a buffer overflow vulnerability can be exploited that allows an attacker to execute arbitrary code to take over the whole system.

  • WID-SEC-W-2023-2188Notepad++: Mehrere Schwachstellen ermöglichen CodeausführungDeutsch2023-08-27csaf · cert_bundDE

    Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Notepad++ ausnutzen, um beliebigen Programmcode auszuführen.

08

also known as (3)

Other names and identifiers for this entity.

09

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducert_bundnvdtrumpf_psirtNVDCVE.orgMITRE
published 2023-08-25modified 2026-06-17
10

references (4)

External citations — patches, advisories, analysis.

scry

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