CVE-2015-9551

Name: CVE-2015-9551
Creator: NVD / NIST
Published: 2020-11-24T21:15:11.417+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 4.22%

Last modified Jun 17, 2026

CVE-2015-9551 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered on TOTOLINK A850R-V1 through 1.0.1-B20150707.1612 and F1-V2 through 1.1-B20150708.1646 devices. There is Remote Code Execution in the management interface via the formSysCmd sysCmd parameter.. EPSS estimates a 4.22% chance of exploitation in the next 30 days.

Description

An issue was discovered on TOTOLINK A850R-V1 through 1.0.1-B20150707.1612 and F1-V2 through 1.1-B20150708.1646 devices. There is Remote Code Execution in the management interface via the formSysCmd sysCmd parameter.

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

EPSS Probability

4.22%

89.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Totolink	A850r-V1 Firmware	< 1.0.1-b20150707.1612
Totolink	F1-V2 Firmware	< 2.1.1-b20150708.1646
Totolink	F2-V1 Firmware	< 2.1.0-b20150320.1611
Totolink	N150rt-V2 Firmware	< 2.1.1-b20150708.1548
Totolink	N151rt-V2 Firmware	< 1.1-b20150708.1559
Totolink	N300rh-V2 Firmware	< 2.0.1-b20150708.1625
Totolink	N300rh-V3 Firmware	< 3.0.0-b20150331.0858
Totolink	N300rt-V2 Firmware	< 2.1.1-b20150708.1613

References

https://pierrekim.github.io/blog/2015-07-16-backdoor-and-RCE-found-in-8-TOTOLINK-products.htmlExploit, Third Party Advisory
https://pierrekim.github.io/blog/2015-07-16-backdoor-and-RCE-found-in-8-TOTOLINK-products.htmlExploit, Third Party Advisory

Timeline

Published: Nov 24, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2015-9551?

How severe is CVE-2015-9551?

CVE-2015-9551 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.22% probability of exploitation in the next 30 days.

How do I fix CVE-2015-9551?

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-2015-9551?

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

Scan your code now

Source: NVD / NIST