CVE-2018-8878Network attack vector

LAN device identifier disclosure via exposed custom_id variable

Published Feb 27, 2020 · Updated Aug 5, 2024

Information disclosure in Asuswrt-Merlin before 384.4 and ASUS firmware before 3.0.0.4.382.50470 allows remote attackers to read LAN identifiers. The blocking.asp page returns the custom_id variable, which contains internal device hostnames and MAC addresses, without enforcing authentication. Network access to the router web interface is sufficient, and the demonstrated consequence is limited to disclosure of LAN device identifiers.

CVSS severity5.3
Medium
EPSS probability1.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Information disclosure in Asuswrt-Merlin before 384.4 and ASUS firmware before 3.0.0.4.382.50470 allows remote attackers to read LAN identifiers. The blocking.asp page returns the custom_id variable, which contains internal device hostnames and MAC addresses, without enforcing authentication. Network access to the router web interface is sufficient, and the demonstrated consequence is limited to disclosure of LAN device identifiers.

The record

CVE
CVE-2018-8878
Published
Feb 27, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-200, T1016
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 27, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1016System Network Configuration Discovery

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo