CVE-2018-8877Network attack vector

Internal network disclosure via exposed error-page variable

Published Feb 27, 2020 · Updated Aug 5, 2024

Information disclosure in ASUS firmware before 3.0.0.4.382.50470 and Asuswrt-Merlin before 384.4 allows remote attackers to obtain internal IP ranges. The unauthenticated error_page.htm response exposes the new_lan_ip variable, returning the LAN addressing value to a remote requester. The disclosure reveals internal addressing details but provides no reported ability to modify data or interrupt the router.

CVSS severity5.3
Medium
EPSS probability1.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in ASUS firmware before 3.0.0.4.382.50470 and Asuswrt-Merlin before 384.4 allows remote attackers to obtain internal IP ranges. The unauthenticated error_page.htm response exposes the new_lan_ip variable, returning the LAN addressing value to a remote requester. The disclosure reveals internal addressing details but provides no reported ability to modify data or interrupt the router.

The record

CVE
CVE-2018-8877
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

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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

5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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

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Your stack

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