CVE-2022-36557Public exploitNetwork attack vector

Authenticated arbitrary file overwrite via restore backup

Published Aug 29, 2022 · Updated Aug 3, 2024

Unrestricted file upload in Seiko Solutions SkyBridge MB-A100/A110 4.2.0 and earlier allows remote authenticated users to overwrite files via restore backup. The restore backup handler accepts a filename containing relative path elements and writes the uploaded content outside the intended backup location, allowing arbitrary files such as web content to be created or replaced. Access requires authenticated WebUI use; successful overwrite can alter configuration or executable web files and may enable administrative code execution.

CVSS severity4.3
Medium
EPSS probability1.06%
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 Seiko Solutions SkyBridge MB-A100/A110 4.2.0 and earlier allows remote authenticated users to overwrite files via restore backup. The restore backup handler accepts a filename containing relative path elements and writes the uploaded content outside the intended backup location, allowing arbitrary files such as web content to be created or replaced. Access requires authenticated WebUI use; successful overwrite can alter configuration or executable web files and may enable administrative code execution.

The record

CVE
CVE-2022-36557
Published
Aug 29, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 29, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3IPA/JVNCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
4.0IPA/JVNAV:N/AC:L/Au:S/C:N/I:P/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 exploitPublished

Weakness, pattern, technique

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

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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