Nightmare Eclipse Drops ‘HardBreacher’ Kaspersky Product Exploit
Description
A privilege escalation vulnerability affecting Kaspersky Endpoint Security was exploited by the researcher known as Nightmare Eclipse, who released a proof-of-concept exploit named HardBreacher. The exploit allows an attacker to take control over the security product's UI process, potentially causing it to malfunction and granting unauthorized access to files. Kaspersky has addressed the issue with an automatic update or manual database update.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Nightmare Eclipse released a proof-of-concept exploit called HardBreacher targeting a privilege escalation vulnerability in Kaspersky Endpoint Security. The exploit enables control over the product's UI process, which can disrupt its functionality and allow unauthorized file access, effectively compromising the operating system's integrity. Kaspersky confirmed that the vulnerability has been patched and the fix is delivered via automatic or manual database updates.
Potential Impact
Successful exploitation can lead to privilege escalation on affected systems, causing Kaspersky Endpoint Security to stop functioning correctly and allowing unauthorized access to files beyond intended permissions. This could destabilize the operating system environment where the product is installed.
Mitigation Recommendations
Kaspersky has released a fix for this vulnerability, which is delivered through an automatic update or can be applied manually via a database update. Users should ensure their Kaspersky Endpoint Security product is fully updated to mitigate this issue.
Technical Details
- Classification
- {"confidence":0.72,"severitySource":"default","classifier":"rss-v2"}
- Article Source
- {"url":"https://www.securityweek.com/nightmare-eclipse-drops-hardbreacher-kaspersky-product-exploit/","fetched":true,"fetchedAt":"2026-08-31T14:37:27.223Z","wordCount":956}
Threat ID: 6a9591a7acd9273b4935fe3e
Added to database: 08/31/2026, 14:37:27 UTC
Last enriched: 09/09/2026, 12:07:58 UTC
Last updated: 10/03/2026, 17:55:28 UTC
Views: 96
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