Medium severity6.3NVD Advisory· Published Jan 29, 2026· Updated Apr 29, 2026

CVE-2026-1623

Description

A weakness has been identified in Totolink A7000R 4.1cu.4154. Impacted is the function setUpgradeFW of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument FileName causes command injection. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.

Affected products

Totolink/A7000r Firmware
cpe:2.3:o:totolink:a7000r_firmware:4.1cu.4154:*:*:*:*:*:*:*

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/04_RCE_setUpgradeFW_RCE.mdnvdExploitThird Party Advisory
github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/04_RCE_setUpgradeFW_RCE.mdnvdExploit
vuldb.comnvdThird Party AdvisoryVDB Entry
vuldb.comnvdThird Party AdvisoryVDB Entry
vuldb.comnvdPermissions RequiredVDB Entry
www.totolink.netnvdProduct

News mentions

No linked articles in our index yet.

Severity

MediumCVSS v3.1

6.3/ 10

CVSS v42.1

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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

Attack vector: Network
Complexity: Low
Privileges: Low
User interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: Low
Availability: Low

Vector

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

EPSS

Probability of exploitation in the next 30 days.

1.38%

VYPR risk score

Composite of severity, exploitation, and reach.

0.41medium

cvss	0.410
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000

Weaknesses

CWE-74
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-77
Improper Neutralization of Special Elements used in a Command ('Command Injection')

CVE ID

CVE-2026-1623

Credits

X(
xuanyu (VulDB User)
reporter