Vulnerabilitycritical
UNC6148 Backdoors Fully-Patched SonicWall SMA 100 Series Devices with OVERSTEP Rootkit
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2021-20035 | Authenticated OS Command Injection in SonicWall SMA100 Appliances | 6.5 | 4% | KEV | KEV |
| CVE-2021-20038 | Unauthenticated Stack Buffer Overflow in SonicWall SMA 100 Appliances | 9.8 | 100% | KEVRansomwarePoC ×2 | KEV |
| CVE-2021-20039 | Improper neutralization of special elements in the SMA100 management interface '/cgi-bin/viewcert' POST http method allows a remote authenticated attacker to… | 8.8 | 79% | PoC | |
| CVE-2024-38475 | Improper Output Escaping in Apache HTTP Server mod_rewrite Enables File Disclosure/Code Execution | 9.1 | 100% | KEV | KEV |
| CVE-2025-32819 | A vulnerability in SMA100 allows a remote authenticated attacker with SSLVPN user privileges to bypass the path traversal checks and delete an arbitrary file… | 8.8 | 6% | PoC |
From the original article
5 min read at thehackernews.com
A threat activity cluster has been observed targeting fully-patched end-of-life SonicWall Secure Mobile Access (SMA) 100 series appliances as part of a campaign designed to drop a backdoor called OVERSTEP . The malicious activity, dating back to at least October 2024, has been attributed by the Google Threat Intelligence Group (GTIG) to a hacking crew it tracks as UNC6148 .
By @TheHackersNews · thehackernews.com
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