CVE-2023-37561Network attack vector

Phishing redirects via crafted URLs

Published Jul 13, 2023 · Updated Nov 5, 2024

Open redirect in ELECOM router and repeater firmware allows remote attackers to send users to arbitrary websites via crafted URLs. ELECOM has not disclosed the affected HTTP endpoint or the URL parameter that accepts and redirects to the untrusted destination. Exploitation requires a logged-in user to open the crafted URL on WRH-300WH-H 2.12 and earlier, WTC-300HWH 1.09 and earlier, or WTC-C1167GC-B and WTC-C1167GC-W 1.17 and earlier, enabling phishing through a trusted device address.

CVSS severity4.7
Medium
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Open redirect in ELECOM router and repeater firmware allows remote attackers to send users to arbitrary websites via crafted URLs. ELECOM has not disclosed the affected HTTP endpoint or the URL parameter that accepts and redirects to the untrusted destination. Exploitation requires a logged-in user to open the crafted URL on WRH-300WH-H 2.12 and earlier, WTC-300HWH 1.09 and earlier, or WTC-C1167GC-B and WTC-C1167GC-W 1.17 and earlier, enabling phishing through a trusted device address.

The record

CVE
CVE-2023-37561
Published
Jul 13, 2023
Updated
Nov 5, 2024
Vendor
ELECOM CO., LTD.
Product
WRH-300WH-H
Classifications
CWE-601, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 13, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 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?

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

  1. Affected versionversion=v2.12 and earlier

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ELECOM CO., LTD. · WRH-300WH-Hversion=v2.12 and earlier
ELECOM CO., LTD. · WTC-300HWHversion=v1.09 and earlier
ELECOM CO., LTD. · WTC-C1167GC-Bversion=v1.17 and earlier
ELECOM CO., LTD. · WTC-C1167GC-Wversion=v1.17 and earlier

Published CVSS scores

2.6JPCERT/CCAV:N/AC:H/Au:N/C:N/I:P/A:N
4.7JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/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 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-601URL Redirection to Untrusted Site ('Open Redirect')
T1204.001User Execution: Malicious Link

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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