CVE-2018-8878

Name: CVE-2018-8878
Creator: NVD / NIST
Published: 2020-02-27T22:15:13.627+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.45%

Last modified Jun 17, 2026

CVE-2018-8878 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Information disclosure in Asuswrt-Merlin firmware for ASUS devices older than 384.4 and ASUS firmware before 3.0.0.4.382.50470 for devices allows remote attackers to acquire information on internal network devices' hostnames and MAC addresses by reading the custom_id variable on the blocking.asp page.. EPSS estimates a 1.45% chance of exploitation in the next 30 days.

Description

Information disclosure in Asuswrt-Merlin firmware for ASUS devices older than 384.4 and ASUS firmware before 3.0.0.4.382.50470 for devices allows remote attackers to acquire information on internal network devices' hostnames and MAC addresses by reading the custom_id variable on the blocking.asp page.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

1.45%

70.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Asuswrt-Merlin	Asuswrt-Merlin	< 384.4
Asus	Asus Firmware	< 3.0.0.4.382.50470

References

https://github.com/outofhere/Research/blob/master/2018/Asus/cve_notes.mdThird Party Advisory
https://github.com/outofhere/Research/blob/master/2018/Asus/cve_notes.mdThird Party Advisory

Timeline

Published: Feb 27, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-8878?

How severe is CVE-2018-8878?

CVE-2018-8878 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.45% probability of exploitation in the next 30 days.

How do I fix CVE-2018-8878?

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-2018-8878?

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

Scan your code now

Source: NVD / NIST