Trending
CVE-2025-15556

CVE detail

CVE-2025-15556

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 7.7 · HighBuzz score 68.0KEV listed

Buzz score

Why this CVE is surfacing

Buzz score total 68.0

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 23.0 · diversity 20.0 · KEV 25.0 · OTX 0.0 · PoC 0.0

Mention score

23.0

9 evidence mentions in the snapshot

Diversity score

20.0

7 sources across 5 categories

KEV score

25.0

Known exploited vulnerability present

OTX score

0.0

0 OTX pulses

PoC score

0.0

0 repos · best confidence N/A

Best PoC traction

Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions: 0; within the 30d window
Peak daily: 0; highest bucket

Evidence

Source links by recency

Newest mentions first

9 source links · newest first

CISA Warns of Exploited SolarWinds, Notepad++, Microsoft VulnerabilitiesSecurityWeek
Disclosed at the end of January, the SolarWinds vulnerability was likely exploited as a zero-day since December 2025.
newswww.securityweek.comFeb 13, 2026, 10:36 AM
U.S. CISA adds SolarWinds Web Help Desk, Notepad++, Microsoft Configuration Manager, and Apple devices flaws to its Known Exploited Vulnerabilities catalogSecurity Affairs
U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds SolarWinds Web Help Desk, Notepad++, Microsoft Configuration Manager, and Apple devices flaws to its Known Exploited Vulnerabilities catalog. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added SolarWinds Web Help Desk, Notepad++, Microsoft Configuration Manager, and Apple devices flaws to its Known Exploited Vulnerabilities (KEV) catalog. Below are the flaws […]
newssecurityaffairs.comFeb 13, 2026, 8:27 AM
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-15556www.cisa.gov
No excerpt available.
Mitigationwww.cisa.govFeb 3, 2026, 1:15 AM
https://notepad-plus-plus.org//news//clarification-security-incident/notepad-plus-plus.org
No excerpt available.
Vendor Advisorynotepad-plus-plus.orgFeb 3, 2026, 1:15 AM
https://www.vulncheck.com/advisories/notepad-plus-plus-wingup-updater-lacks-update-integrity-verificationwww.vulncheck.com
No excerpt available.
Exploitwww.vulncheck.comFeb 3, 2026, 1:15 AM
https://notepad-plus-plus.org/news/hijacked-incident-info-update/notepad-plus-plus.org
No excerpt available.
Vendor Advisorynotepad-plus-plus.orgFeb 3, 2026, 1:15 AM
https://github.com/notepad-plus-plus/wingup/commit/ce0037549995ed0396cc363544d14b3425614fdbgithub.com
No excerpt available.
Exploitgithub.comFeb 3, 2026, 1:15 AM
https://github.com/notepad-plus-plus/notepad-plus-plus/commit/bcf2aa68ef414338d717e20e059459570ed6c5abgithub.com
No excerpt available.
Exploitgithub.comFeb 3, 2026, 1:15 AM
https://community.notepad-plus-plus.org/topic/27298/notepad-v8-8-9-vulnerability-fixcommunity.notepad-plus-plus.org
No excerpt available.
Release Notescommunity.notepad-plus-plus.orgFeb 3, 2026, 1:15 AM

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

0 repository references · best confidence N/A · max 0 stars

No public PoC repositories have been matched yet.

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External lookup

Potential internet exposure

Potential exposure only — not proof of vulnerability.Shodan results indicate potentially internet-exposed products, not confirmed vulnerable systems. They do not confirm that any returned system is vulnerable to CVE-2025-15556.

Product-level CPE searches intentionally omit version fields and NVD version-range or configuration certainty. Verify the exact product version and configuration independently.

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Product CPE queries

Derived from this CVE's existing NVD CPE 2.3 records; the application, operating-system, or hardware part is retained.

cpe:2.3:a:notepad-plus-plus:notepad\+\+Search this product on Shodan

Exact CVE query

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vuln:CVE-2025-15556Search this CVE on Shodan

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Metadata

Canonical fields

NVD status

Analyzed

Published

Feb 3, 2026

Modified

Jun 17, 2026

Official record

Authoritative NVD record

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CWE IDs

Vendor classifications

How this vector reads

CVSS 4.0 base metrics decoded below. This explanation does not recalculate or change the NVD score.

Attack Vector (AV): Network. The vulnerable system can be reached across network boundaries.
Attack Complexity (AC): High. Successful exploitation depends on conditions outside the attacker's control.
Attack Requirements (AT): None. No prerequisite deployment or execution condition is required.
Privileges Required (PR): None. The attacker needs no privileges on the vulnerable system.
User Interaction (UI): Passive. A targeted user must unknowingly interact with the vulnerable system.
Vulnerable System Confidentiality (VC): High. There is a total or serious impact to this security property.
Vulnerable System Integrity (VI): High. There is a total or serious impact to this security property.
Vulnerable System Availability (VA): High. There is a total or serious impact to this security property.
Subsequent System Confidentiality (SC): None. There is no direct impact to this security property.
Subsequent System Integrity (SI): None. There is no direct impact to this security property.
Subsequent System Availability (SA): None. There is no direct impact to this security property.

Optional CVSS v4 metrics remain in the raw vector; only base metrics are expanded here.

Signals

Exploitation indicators

1 stored signals · KEV present · 0 OTX pulses

KEVKEV
- cwes: CWE-494
- dueDate: 2026-03-05
- knownRansomwareCampaignUse: Unknown
- notes: https://notepad-plus-plus.org/news/clarification-security-incident/ ; https://community.notepad-plus-plus.org/topic/27298/notepad-v8-8-9-vulnerability-fix ; https://nvd.nist.gov/vuln/detail/CVE-2025-15556
- product: Notepad++
- requiredAction: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- shortDescription: Notepad++ when using the WinGUp updater, contains a download of code without integrity check vulnerability that could allow an attacker to intercept or redirect update traffic to download and execute an attacker-controlled installer. This could lead to arbitrary code execution with the privileges of the user.
- vendorProject: Notepad++
- vulnerabilityName: Notepad++ Download of Code Without Integrity Check Vulnerability
Observed Feb 12, 2026, 12:00 AM