Notepad++ supply-chain incident - SecTeer impact assessment
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The reported Notepad++ supply-chain incident, as described in public reporting, was limited to the application’s built-in auto-update mechanism.
SecTeer VulnDetect does not use or depend on the Notepad++ auto-updater. All Notepad++ packages distributed through SecTeer are downloaded directly from the official vendor source and processed through SecTeer’s own validation pipeline.
This includes:
- Verification of the Authenticode signature where the vendor provides signed binaries
- Malware scanning using Microsoft Defender
- Additional reputation-based checks as a supplementary control
SecTeer packages are released independently of the vendor’s auto-update channel and are not delivered through the update mechanism involved in the reported incident. As a result, SecTeer did not distribute compromised code, and SecTeer’s distribution infrastructure was not impacted.
A system could only have received the compromised update if both of the following were true:
- Notepad++ was not updated via SecTeer, and
- The built-in Notepad++ auto-update feature was enabled on the system
In short: SecTeer’s update mechanism was not involved in the incident, and no compromised Notepad++ packages were delivered through the SecTeer platform.
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