Critical 9.8Published Apr 9, 2026

CVE-2026-5853Totolink A7100RU CGI cstecgi.cgi setIpv6LanCfg os command injection

Updated under an hour ago (Oct 26, 2026, 12:50 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for Totolink A7100RU

Exploited in the last 30 days

A security vulnerability has been detected in Totolink A7100RU 7.4cu.2313_b20191024. Affected by this vulnerability is the function setIpv6LanCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument addrPrefixLen leads to os command injection. The attack may be performed from remote. The exploit has been disclosed publicly and may be used.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
Weakness (CWE): CWE-78, CWE-77
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: Apr 9, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Totolink A7100RU totolink:a7100ru_firmware	7.4cu.2313_b20191024	CNA record

References

References

https://vuldb.com/vuln/356379	vdb-entry, technical-description
https://vuldb.com/vuln/356379/cti	signature, permissions-required
https://vuldb.com/submit/791274	third-party-advisory
https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_159/README.md	exploit
https://www.totolink.net/	product

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.