CVE-2026-3301

Name: CVE-2026-3301
Creator: NVD / NIST
Published: 2026-02-27T06:18:00.48+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.9/10EPSS 4.03%

Last modified Jun 17, 2026

CVE-2026-3301 is a high-severity vulnerability rated 8.9/10 on the CVSS scale. A security flaw has been discovered in Totolink N300RH 6.1c.1353_B20190305. Affected by this vulnerability is the function setWebWlanIdx of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. EPSS estimates a 4.03% chance of exploitation in the next 30 days.

Description

A security flaw has been discovered in Totolink N300RH 6.1c.1353_B20190305. Affected by this vulnerability is the function setWebWlanIdx of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Performing a manipulation of the argument webWlanIdx results in os command injection. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks.

Metrics

CVSS 3.1

9.8/10

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

CVSS 4.0

8.9/10

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/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

4.03%

89.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Totolink	N300rh Firmware	6.1c.1349_b20181018
Totolink	N300rh Firmware	6.1c.1353_b20190305

References

https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/N300RHv4/01_setWebWlanIdx_RCE/README.mdExploit, Third Party Advisory
https://vuldb.com/?ctiid.348052Permissions Required, VDB Entry
https://vuldb.com/?id.348052Third Party Advisory, VDB Entry
https://vuldb.com/?submit.761297Third Party Advisory, VDB Entry
https://www.totolink.net/Product

Timeline

Published: Feb 27, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-3301?

How severe is CVE-2026-3301?

CVE-2026-3301 has a CVSS score of 8.9/10 (HIGH severity). The EPSS model estimates a 4.03% probability of exploitation in the next 30 days.

How do I fix CVE-2026-3301?

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-2026-3301?

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

Scan your code now

Source: NVD / NIST