CVE-2025-15556

HIGH7.5

CISA KEV

Published 2026-02-03 · Updated 2026-06-17 · Source disclosure@vulncheck.com

Summary

CVE-2025-15556 is a high-severity (CVSS 7.5) vulnerability in Notepad++ Notepad++. CISA added it to the Known Exploited Vulnerabilities catalog on February 12, 2026, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by March 5, 2026. CISA does not currently list it as used in ransomware campaigns.

All 1 known-exploited Notepad++ vulnerabilities →

Description

Notepad++ versions prior to 8.8.9, when using the WinGUp updater, contain an update integrity verification vulnerability where downloaded update metadata and installers are not cryptographically verified. An attacker able to intercept or redirect update traffic can cause the updater to download and execute an attacker-controlled installer, resulting in arbitrary code execution with the privileges of the user.

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

CWE-494

CISA Known-Exploited Vulnerability

Product: Notepad++ — Notepad++

Name: Notepad++ Download of Code Without Integrity Check Vulnerability

Date added: 2026-02-12 · Due: 2026-03-05

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

References

View on NVD

Related CVEs

Same severity, most recent

CVE-2026-120531
The Subscribe2 – Form, Email Subscribers & Newsletters plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘data[ip]’ parameter in all versions up to, and including, 10.47 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
2026-11-07 · score 7.2
CVE-2026-123991
A vulnerability was detected in DataEase up to 2.10.27. Affected by this vulnerability is the function WhitelistUtils.endsWithAny of the file WhitelistUtils.java of the component Authentication Filter. Performing a manipulation of the argument File results in unrestricted upload. It is possible to initiate the attack remotely. The exploit is now public and may be used. Upgrading to version 2.10.28 addresses this issue. It is advisable to upgrade the affected component. The vendor confirms: "This issue has been addressed by enforcing authentication on the standalone static-resource upload endpoint independently of the URI suffix whitelist."
2026-11-07 · score 7.3
CVE-2026-123990
A security vulnerability has been detected in DataEase up to 2.10.27/3.1.0. Affected is the function ExtWhere2Str.extWhere2sqlOjb of the file engine/trans/ExtWhere2Str.java of the component Chart Data Handler. Such manipulation of the argument operator leads to sql injection. The attack may be performed from remote. The exploit has been disclosed publicly and may be used. Upgrading to version 3.2.0 is able to address this issue. Upgrading the affected component is advised. The vendor confirms: "The fix validates the complete compound operator and uses fixed AND / OR keywords instead of concatenating user-controlled logic into SQL."
2026-11-07 · score 7.3
CVE-2026-124318
Treeio through 2.0 contains an insecure deserialization vulnerability in UpdateRecord.get_format_strings and ModuleSetting.loads that allows staff users to execute code via unverified pickle data. Attackers can store a crafted base64 pickle payload in an UpdateRecord format_strings field through the Django admin, executing Python code as the web server user when news feeds render.
2026-11-07 · score 7.2
CVE-2026-123963
A security vulnerability has been detected in OpenBMB Internet of Agents up to 9d78e88e47160eb42ee1ee8538c05e1c2c47877a. The impacted element is the function register of the file im_server/app.py of the component Agent Registry. Such manipulation of the argument desc/name leads to missing authentication. The attack can be launched remotely. The exploit has been disclosed publicly and may be used. This product does not use versioning. This is why information about affected and unaffected releases are unavailable. The project was informed of the problem early through an issue report but has not responded yet.
2026-11-07 · score 7.3