Page generated: 11 Nov 2026, 08:30 UTC
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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 upda…

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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 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.2/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 7.7: +1.16
  • Fresh EPSS: 1.75%: +0.01

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 10 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

Tech Times
Press · 25 Jul 2026, 07:00 · Fake Notepad++ Plugin Hides Russian Malware Targeting Ukrainian Defense Teams - Tech Times
Cyfirma
Press · 29 Jun 2026, 07:00 · THREAT LANDSCAPE INDONESIA - Cyfirma
Recorded Future
Press · 12 Mar 2026, 07:00 · February 2026 CVE Landscape: 13 Critical Vulnerabilities Mark 43% Drop from January - Recorded Future
Flashpoint.io
Press · 26 Feb 2026, 08:00 · What to Know About the Notepad++ Supply-Chain Attack - Flashpoint.io
The Hacker News
Press · 18 Feb 2026, 08:00 · Notepad++ Fixes Hijacked Update Mechanism Used to Deliver Targeted Malware - The Hacker News
See all 10 source documents
The Hacker News
Press · 13 Feb 2026, 08:00 · Researchers Observe In-the-Wild Exploitation of BeyondTrust CVSS 9.9 Vulnerability - The Hacker News
The Record from Recorded Future News
Press · 13 Feb 2026, 08:00 · CISA orders federal agencies to patch exploited SolarWinds, Apple, Microsoft bugs within weeks - The Record from Recorded Future News
SecurityWeek
Press · 13 Feb 2026, 08:00 · CISA Warns of Exploited SolarWinds, Notepad++, Microsoft Vulnerabilities - SecurityWeek
CyberSecurityNews
Press · 12 Feb 2026, 08:00 · CISA Warns of Notepad++ Code Execution Vulnerability Exploited in Attacks - CyberSecurityNews
The Hacker News
Press · 03 Feb 2026, 08:00 · Notepad++ Hosting Breach Attributed to China-Linked Lotus Blossom Hacking Group - The Hacker News

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.2 (2026-11-02 15:13). The curve appears once the score changes.

Public exploit evidence

0

Public exploit entries / repo candidates

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 7.7; EPSS 1.7%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior privileges, passive user interaction, additional attack conditions.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:59:28.494260+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
Published
03 Feb 2026, 00:50
First press mention
03 Feb 2026, 08:00
Added to the CISA KEV catalog
12 Feb 2026, 00:00
Latest press mention
25 Jul 2026, 07:00
Score calculated
05 Nov 2026, 13:59