CVE-2026-48770

mediumpriority · track · 10EPSS 0.001 · 3 %ileexploit · PoCDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

0.14% (3rd) EPSS

CVSS 5 · medium

Is it mine?

5 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

Notepad++ is a free and open-source source code editor. Prior to 8.9.6.1, a local process in the same interactive Windows session can send a malformed WM_COPYDATA message to Notepad++ using the COPYDATA_FULL_CMDLINE path. The handler appears to process COPYDATASTRUCT.lpData as an unbounded NUL-terminated wchar_t* instead of enforcing COPYDATASTRUCT.cbData. This vulnerability is fixed in 8.9.6.1.

cvss

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

5.0

010

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

v3.15mediumAV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.15mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.15mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:Hsecondary · security-advisories@github.comexploitability 1.3 · impact 3.6

v3.14.7mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H/E:Psecondary · CVSS-BT (t0sche)

ssvc

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

Exploitation: poc · Automatable: no · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-125USCWE-125US

exploits (1)

Public proof-of-concept and weaponised exploit code.

atiilla/Notepad-8.9.6-PoCProof-of-concept scripts for three vulnerabilities in Notepad++ <= 8.9.6, patched in v8.9.6.1 (2026-05-26) CVE-2026-48770 / CVE-2026-48778 / CVE-2026-48800PoC · poc_in_github

affected products (5)

Products and version ranges known to be affected.

Open Source Notepad++ <8.9.6.1all versionscert_bundDE
Open Source Notepad++< 8.9.6.1cert_bundDE
notepad-plus-plus notepad-plus-plus≤ < 8.9.6.1enisa_euvdEU
Don Ho Notepad++≤ 8.9.6.1fstec_bduRU
notepad-plus-plus notepad++< 8.9.6.1nvdUScpe:2.3:a:notepad-plus-plus:notepad\+\+:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1679Notepad++: Mehrere SchwachstellenDeutsch2026-05-26csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Notepad++ ausnutzen, um einen Denial of Service Angriff durchzuführen, und um beliebigen Programmcode auszuführen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd NVD CVE.org MITRE

published 2026-06-26modified 2026-06-29

references (7)

External citations — patches, advisories, analysis.

scry

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