CVE-2026-5853 | THREATINT

Description

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.

PUBLISHED Reserved 2026-04-08 | Published 2026-04-09 | Updated 2026-04-09 | Assigner VulDB

CRITICAL: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

CRITICAL: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

CRITICAL: 9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

10.0AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR

Problem types

OS Command Injection

Command Injection

Product status

7.4cu.2313_b20191024

affected

Timeline

2026-04-08:	Advisory disclosed
2026-04-08:	VulDB entry created
2026-04-08:	VulDB entry last update

Credits

LtzHuster2 (VulDB User) reporter

References

vuldb.com/vuln/356379 (VDB-356379 | Totolink A7100RU CGI cstecgi.cgi setIpv6LanCfg os command injection) vdb-entry technical-description

vuldb.com/vuln/356379/cti (VDB-356379 | CTI Indicators (IOB, IOC, TTP, IOA)) signature permissions-required

vuldb.com/submit/791274 (Submit #791274 | Totolink A7100RU 7.4cu.2313_b20191024 Command Injection) third-party-advisory

github.com/.../vuldb_new/blob/main/A7100RU/vul_159/README.md exploit

www.totolink.net/ product

cve.org (CVE-2026-5853)

nvd.nist.gov (CVE-2026-5853)

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