CVE-2026-9457 | A vulnerability was determined in Totolink A8000RU 7.1cu.643… | CVSS 9.8 CRITICAL

Description

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.

Metadata

CVE ID: CVE-2026-9457
State: PUBLISHED
Assigner: VulDB
Reserved: 2026-05-24 07:57 UTC
Published: 2026-05-25 12:15 UTC
Last updated: 2026-05-26 14:53 UTC
Primary CWE: CWE-78
OS Command Injection
Vendor / Product: Totolink / A8000RU
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
Totolink	A8000RU	—	7.1cu.643_b20200521

Weakness (CWE)

CWE	Source	Description
CWE-77	cna	Command Injection
CWE-78	cna	OS Command Injection

CVSS scores (4)

Score	Severity	Version	Source	Vector
10.0	N/D	2.0	cna	AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
9.8	CRITICAL	3.1	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
9.8	CRITICAL	3.0	cna	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
9.3	CRITICAL	4.0	cna	CVSS: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

References (5)

VDB-365438 | Totolink A8000RU Web Management cstecgi.cgi UploadFirmwareFile os command injection https://vuldb.com/vuln/365438
VDB-365438 | CTI Indicators (IOB, IOC, TTP, IOA) https://vuldb.com/vuln/365438/cti
Submit #813454 | Totolink A8000RU 7.1cu.643_b20200521 Command Injection https://vuldb.com/submit/813454
https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_343/README.md
https://www.totolink.net/