CVE-2025-36519Network attack vector

Authenticated code execution via unrestricted file upload

Published Jun 24, 2025 · Updated Feb 3, 2026

Unrestricted file upload in affected ELECOM WRC router firmware allows remote authenticated users to execute arbitrary code via a crafted file. ELECOM has not disclosed the upload endpoint or its validation logic; published records state only that dangerous file types are accepted. Access requires valid management credentials, and successful exploitation runs attacker-supplied code on the router; no confidentiality or availability impact is reported.

CVSS severity5.3
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in affected ELECOM WRC router firmware allows remote authenticated users to execute arbitrary code via a crafted file. ELECOM has not disclosed the upload endpoint or its validation logic; published records state only that dangerous file types are accepted. Access requires valid management credentials, and successful exploitation runs attacker-supplied code on the router; no confidentiality or availability impact is reported.

The record

CVE
CVE-2025-36519
Published
Jun 24, 2025
Updated
Feb 3, 2026
Vendor
ELECOM CO., LTD.
Product
WRC-2533GS2-W
Classifications
CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 3, 2026Record 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?

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

  1. Affected versionversion=v1.69 and earlier

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ELECOM CO., LTD. · WRC-2533GS2-Wversion=v1.69 and earlier
ELECOM CO., LTD. · WRC-1167GS2H-Bversion=v1.74 and earlier
ELECOM CO., LTD. · WRC-2533GS2V-Bversion=v1.69 and earlier
ELECOM CO., LTD. · WRC-2533GS2-Bversion=v1.69 and earlier
ELECOM CO., LTD. · WRC-2533GST2version=v1.31 and earlier
ELECOM CO., LTD. · WRC-1167GST2version=v1.34 and earlier
ELECOM CO., LTD. · WRC-1167GS2-Bversion=v1.74 and earlier

Published CVSS scores

4.3JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
5.3JPCERT/CCCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1190Exploit Public-Facing Application

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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