Kaspersky Lab protects over 400 million users and 270,000 corporate clients. Their web protection module blocks access to flagged URLs across all their products, including Kaspersky Internet Security, Total Security, and the enterprise Endpoint Security suite. Due to their large user base in Eastern Europe and Asia, a Kaspersky false positive can severely impact international businesses.
Step by step
Check the Kaspersky Threat Intelligence Portal
Visit opentip.kaspersky.com and look up your URL. This shows you exactly how Kaspersky classifies your domain, including the threat name, detection date, and category. Screenshot this for your records.
Understand the classification
Kaspersky uses categories like "Dangerous" (malware), "Phishing," "Not recommended" (suspicious), and "Adware." Each triggers different blocking behaviors. "Dangerous" blocks are the most aggressive and impact the most users.
Tip: If your site is classified as "Not recommended" rather than "Dangerous," some Kaspersky users may still access it with a warning click-through. Still resolve it. The warning erodes visitor trust.
Submit via the Kaspersky support portal
Navigate to Kaspersky's false positive/negative reporting page. You'll need to: register or log in, select "URL" as the type, provide the flagged URL, and select "False positive" as the report type.
Provide detailed context
Write a thorough description: your company name, the legitimate purpose of the site, when the false positive was first noticed, and whether any recent changes to hosting or content occurred. If your site was previously compromised and cleaned, explain the timeline and fixes.
Wait for analysis
Kaspersky is known for thorough but slow reviews. Expect 5-10 business days for initial processing. For critical business impact, mention this in your submission and provide business context (e.g., lost revenue, affected customer count).
Tip: If you have a direct Kaspersky enterprise relationship or partner channel, escalate through those contacts for faster processing.
Verify across products
Once resolved, Kaspersky updates propagate through their cloud-based Kaspersky Security Network (KSN) within hours to days. Verify on VirusTotal and, if possible, test with a Kaspersky installation directly.
How long it takes
5-10 business days (one of the slower vendors)