CVE•Published 2026-04-30•Modified 2026-05-01•0 articles on news•5 live references•NVD data

CVE-2026-6539Notepad-plus-plus · Notepad\+\+

Vulnerability data via NVD (ingested)

CVSS v3.1

4.4

MEDIUM

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

EPSS percentile

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Weaknesses (CWE)

CWE-134Use of Externally-Controlled Format String

Description

Notepad++ 8.9.3 contains a format string injection vulnerability in the Find Results panel handler that allows attackers to cause denial of service and information disclosure by crafting a malicious nativeLang.xml language pack file. Attackers can distribute a poisoned language pack through community channels that triggers format string interpretation when a user performs search operations, leading to access violations and potential leakage of stack or register contents.

Timeline

Published 2026-04-30

Modified 2026-05-01

External references

NVD MITRE Exploit-DB Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-6539

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product + version

product:"Notepad-plus-plus Notepad\+\+" version:"8.9.3"

Version-pinned fingerprint from NVD's first vulnerable CPE.

Shodan · banner/body mention

http.html:"Notepad\+\+"

HTTP body or banner mentions "Notepad\+\+" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-6539