CVE-2020-13859

Name: CVE-2020-13859
Creator: NVD / NIST
Published: 2021-02-01T02:15:14.8+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.18%

Last modified Jun 17, 2026

CVE-2020-13859 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered on Mofi Network MOFI4500-4GXeLTE 4.0.8-std devices. A format error in /etc/shadow, coupled with a logic bug in the LuCI - OpenWrt Configuration Interface framework, allows the undocumented system account mofidev to login to the cgi-bin/luci/quick/wizard management interface without a password by abusing a forgotten-password feature.. EPSS estimates a 1.18% chance of exploitation in the next 30 days.

Description

An issue was discovered on Mofi Network MOFI4500-4GXeLTE 4.0.8-std devices. A format error in /etc/shadow, coupled with a logic bug in the LuCI - OpenWrt Configuration Interface framework, allows the undocumented system account mofidev to login to the cgi-bin/luci/quick/wizard management interface without a password by abusing a forgotten-password feature.

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

1.18%

63.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mofinetwork	Mofi4500-4gxelte Firmware	4.0.8-std

References

https://mofinetwork.com/index.php?main_page=page&id=14Patch, Vendor Advisory
https://www.criticalstart.com/critical-vulnerabilities-discovered-in-mofi-routers/Technical Description, Third Party Advisory
https://mofinetwork.com/index.php?main_page=page&id=14Patch, Vendor Advisory
https://www.criticalstart.com/critical-vulnerabilities-discovered-in-mofi-routers/Technical Description, Third Party Advisory

Timeline

Published: Feb 1, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-13859?

How severe is CVE-2020-13859?

CVE-2020-13859 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.18% probability of exploitation in the next 30 days.

How do I fix CVE-2020-13859?

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-2020-13859?

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

Scan your code now

Source: NVD / NIST