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Description

A vulnerability was identified in Totolink A8000R 5.9c.681_B20180413. This issue affects the function setLanguageCfg of the file /cgi-bin/cstecgi.cgi. Such manipulation of the argument langType leads to missing authentication. The attack can be launched remotely. The exploit is publicly available and might be used.

PUBLISHED Reserved 2026-04-06 | Published 2026-04-06 | Updated 2026-04-06 | Assigner VulDB




MEDIUM: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
HIGH: 7.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:W/RC:R
HIGH: 7.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:W/RC:R
7.5AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:W/RC:UR

Problem types

Missing Authentication

Improper Authentication

Product status

5.9c.681_B20180413
affected

Timeline

2026-04-06:Advisory disclosed
2026-04-06:VulDB entry created
2026-04-06:VulDB entry last update

Credits

skeet (VulDB User) reporter

References

vuldb.com/vuln/355503 (VDB-355503 | Totolink A8000R cstecgi.cgi setLanguageCfg missing authentication) vdb-entry technical-description

vuldb.com/vuln/355503/cti (VDB-355503 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/submit/792433 (Submit #792433 | Totolink A8000R V5.9c.681_B20180413 Improper Authentication) third-party-advisory

github.com/...-TOTOLINK-A800R/blob/main/vuln1_auth_bypass.md exploit

www.totolink.net/ product

cve.org (CVE-2026-5676)

nvd.nist.gov (CVE-2026-5676)

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