CVE-2025-43877Network attack vector

Stored script execution via undisclosed WebGUI handling

Published Jun 24, 2025 · Updated Jun 25, 2025

Stored cross-site scripting in all versions of ELECOM WRC-1167GHBK2-S allows remote authenticated users to execute scripts in users' browsers. The public advisories identify the WebGUI as the storage and rendering surface but do not disclose the affected field, request, or missing neutralization operation. The attacker needs WebGUI login access, and execution occurs when another user accesses the WebGUI, allowing script actions within that browser session.

CVSS severity4.8
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in all versions of ELECOM WRC-1167GHBK2-S allows remote authenticated users to execute scripts in users' browsers. The public advisories identify the WebGUI as the storage and rendering surface but do not disclose the affected field, request, or missing neutralization operation. The attacker needs WebGUI login access, and execution occurs when another user accesses the WebGUI, allowing script actions within that browser session.

The record

CVE
CVE-2025-43877
Published
Jun 24, 2025
Updated
Jun 25, 2025
Vendor
ELECOM CO., LTD.
Product
WRC-1167GHBK2-S
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=all versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ELECOM CO., LTD. · WRC-1167GHBK2-Sversion=all versions

Published CVSS scores

4.8JPCERT/CCCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
5.4JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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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