CVE-2026-5676

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.

CVSS v4.0

5.5 MEDIUMCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

7.3 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS v2.0

7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS

0.40% chance of exploitation in the next 30 days, 34th percentile

Published

2026-04-06

Updated

2026-04-07

Proof-of-concept exploits (1)

• skeetabc/CVE-TOTOLINK-A800R/blob/main/vuln1_auth_bypass.md

References

• CVE Record
• NVD entry

Related

• CVE-2026-5675
• CVE-2026-56766
• CVE-2026-5672
• CVE-2026-56769
• CVE-2026-5671
• CVE-2026-5677