CVE-2026-9457

A vulnerability was determined in Totolink A8000RU 7.1cu.643_b20200521. The affected element is the function UploadFirmwareFile of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. This manipulation of the argument FileName causes os command injection. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized.

CVSS v4.0

8.9 HIGHCVSS: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/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

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0

10.0 HIGHAV:N/AC:L/Au:N/C:C/I:C/A:C

EPSS

2.09% chance of exploitation in the next 30 days, 80th percentile

Published

2026-05-25

Updated

2026-05-26

Proof-of-concept exploits (1)

• Litengzheng/vuldb_new2/blob/main/A8000RU/vul_343/README.md

References

• CVE Record
• NVD entry

Related

• CVE-2026-9456
• CVE-2026-9458
• CVE-2026-9455
• CVE-2026-9459
• CVE-2026-9454
• CVE-2026-9460