CVE-2025-64056Public exploit

Unauthenticated arbitrary file write via path injection

Published Dec 5, 2025 · Updated Jul 5, 2026

Arbitrary file upload in Fanvil X210 V2 firmware 2.12.20 allows remote attackers to write files via the local network. The webconfig upload handler accepts an unsanitized upload/dest path, and the root-run web service writes the supplied file to that path. No authentication is required, but access is limited to the device's local network; arbitrary writes can modify the filesystem and alter device behavior.

CVSS severity4.3
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary file upload in Fanvil X210 V2 firmware 2.12.20 allows remote attackers to write files via the local network. The webconfig upload handler accepts an unsanitized upload/dest path, and the root-run web service writes the supplied file to that path. No authentication is required, but access is limited to the device's local network; arbitrary writes can modify the filesystem and alter device behavior.

The record

CVE
CVE-2025-64056
Published
Dec 5, 2025
Updated
Jul 5, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-306, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 5, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 5, 2026Record 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 vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/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.

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No observations available

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

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1210Exploitation of Remote Services

Public exploit references

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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