Vulnerability · Published May 8, 2026 · Assigned by VulDB
CVE-2026-8137Totolink X5000R formDdns sub_458E40 buffer overflow
High 8.8
In plain English
A high-severity buffer overflow in X5000R from Totolink. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.5%top 59.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A vulnerability has been found in Totolink X5000R 9.1.0u.6369_B20230113. This vulnerability affects the function sub_458E40 of the file /boafrm/formDdns. The manipulation of the argument submit-url leads to buffer overflow. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used.
Affected products (as reported)
Weakness: CWE-120, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
References
- VDB-361926 | Totolink X5000R formDdns sub_458E40 buffer overflow vdb-entry, technical-description
- VDB-361926 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #808863 | Totolink X5000R V9.1.0u.6369_B20230113 Stack-based Buffer Overflow third-party-advisory
- https://github.com/Kiciot/cve/issues/4 exploit, issue-tracking
- https://www.totolink.net/ product