CVE-2026-5103

Name: CVE-2026-5103
Creator: NVD / NIST
Published: 2026-03-30T02:16:15.84+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2.1/10EPSS 3.64%

Last modified Jun 17, 2026

CVE-2026-5103 is a low-severity vulnerability rated 2.1/10 on the CVSS scale. A weakness has been identified in Totolink A3300R 17.0.0cu.557_b20221024. This issue affects the function setUPnPCfg of the file /cgi-bin/cstecgi.cgi. EPSS estimates a 3.64% chance of exploitation in the next 30 days.

Description

A weakness has been identified in Totolink A3300R 17.0.0cu.557_b20221024. This issue affects the function setUPnPCfg of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument enable causes command injection. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks.

Metrics

CVSS 3.1

8.8/10

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

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

3.64%

88.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Totolink	A3300r Firmware	17.0.0cu.557_b20221024

References

https://github.com/LvHongW/Vuln-of-totolink_A3300R/tree/main/A3300R_enable_cmd_injectExploit, Third Party Advisory
https://vuldb.com/submit/779140Permissions Required, VDB Entry
https://vuldb.com/vuln/354128Third Party Advisory, VDB Entry
https://vuldb.com/vuln/354128/ctiThird Party Advisory, VDB Entry
https://www.totolink.net/Product

Timeline

Published: Mar 30, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-5103?

How severe is CVE-2026-5103?

CVE-2026-5103 has a CVSS score of 2.1/10 (LOW severity). The EPSS model estimates a 3.64% probability of exploitation in the next 30 days.

How do I fix CVE-2026-5103?

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-2026-5103?

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

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Source: NVD / NIST