| Title | TOTOLINK TOTOLINK NR1800X V9.1.0u.6279_B20210910 V9.1.0u.6279_B20210910 Buffer Overflow |
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| Description | TOTOLINK NR1800X firmware V9.1.0u.6279_B20210910 contains an unauthenticated stack-based buffer overflow in the vendor-customized lighttpd binary (/usr/sbin/lighttpd). The issue is reachable in Form_Logout because userloginAuth() matches the URI with strstr("formLogout.htm") before authentication checks. A remote attacker can send a crafted request with an oversized Host header to trigger the overflow. |
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| Source | ⚠️ https://github.com/fu9-dotom/cve/issues/1 |
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| User | fuguang (UID 98938) |
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| Submission | 06/11/2026 16:53 (1 month ago) |
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| Moderation | 07/14/2026 07:27 (1 month later) |
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| Status | Accepted |
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| VulDB entry | 378248 [Totolink NR1800X 9.1.0u.6279_B20210910 lighttpd /formLogout.htm Form_Logout Host stack-based overflow] |
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| Points | 20 |
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