CVE-2026-1623

Name: CVE-2026-1623
Creator: NVD / NIST
Published: 2026-01-29T21:15:53.427+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2.1/10EPSS 1.98%

Last modified Jun 17, 2026

CVE-2026-1623 is a low-severity vulnerability rated 2.1/10 on the CVSS scale. A weakness has been identified in Totolink A7000R 4.1cu.4154. Impacted is the function setUpgradeFW of the file /cgi-bin/cstecgi.cgi. EPSS estimates a 1.98% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.3/10

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

CVSS 4.0

2.1/10

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

EPSS Probability

1.98%

78.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Totolink	A7000r Firmware	4.1cu.4154

References

https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/04_RCE_setUpgradeFW_RCE.mdExploit, Third Party Advisory
https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A7000R/04_RCE_setUpgradeFW_RCE.md#pocExploit
https://vuldb.com/?ctiid.343382Permissions Required, VDB Entry
https://vuldb.com/?id.343382Third Party Advisory, VDB Entry
https://vuldb.com/?submit.740767Third Party Advisory, VDB Entry
https://www.totolink.net/Product

Timeline

Published: Jan 29, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-1623?

How severe is CVE-2026-1623?

CVE-2026-1623 has a CVSS score of 2.1/10 (LOW severity). The EPSS model estimates a 1.98% probability of exploitation in the next 30 days.

How do I fix CVE-2026-1623?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-1623?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST