Vulnerability · Published May 1, 2026 · Assigned by VulDB
CVE-2026-7546Totolink NR1800X lighttpd find_host_ip stack-based overflow
Critical 9.8
In plain English
A critical-severity stack buffer overflow in NR1800X from Totolink. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 55% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.8%top 44.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A security vulnerability has been detected in Totolink NR1800X 9.1.0u.6279_B20210910. The impacted element is the function find_host_ip of the component lighttpd. Such manipulation of the argument Host leads to stack-based buffer overflow. The attack can be executed remotely. The exploit has been disclosed publicly and may be used.
Affected products (as reported)
Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:W/RC:R
References
- VDB-360357 | Totolink NR1800X lighttpd find_host_ip stack-based overflow vdb-entry, technical-description
- VDB-360357 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #804404 | Totolink C834FR-1C NR1800X 内存损坏 third-party-advisory
- https://github.com/newym/cve/blob/main/totolinknr1800x.md exploit
- https://www.totolink.net/ product