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CVE-2026-8137

Totolink X5000R formDdns sub_458E40 buffer overflow

CVSS 8.7 HIGHEPSS 0.5%CWE-119CWE-120
Vexday Risk Score
41Attention
SSVC decision (CISA)
Attend
PoC available → attend closely
CVSS 8.7EPSS 0.5%KEV nãoPoC públicaNuclei —Metasploit —Patch —
Lifecycle
08 May 2026Published on NVD
Recommendation: Plan a near-term fix — a public PoC already exists.
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
Affected products
Totolink · X5000R
public PoCs found — 1
cve_referencegithub.com/Kiciot/cve/issues/4unverified
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References
https://github.com/Kiciot/cve/issues/4https://vuldb.com/submit/808863https://vuldb.com/vuln/361926https://vuldb.com/vuln/361926/ctihttps://www.totolink.net/