CVE-2020-36488Public exploitNetwork attack vector

Authenticated file disclosure via FTP path traversal

Published Oct 22, 2021 · Updated Aug 4, 2024

Directory traversal in the Sky File 2.1.0 FTP server allows remote authenticated users to read files via crafted /null// path commands. The server permits an anonymous FTP account to combine CWD and CDUP navigation with the malformed path without confining resolution to the application directory. Network access to the device's Wi-Fi FTP service and valid anonymous-account credentials are required, and exploitation exposes files without modifying them.

CVSS severity6.5
Medium
EPSS probability1.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Directory traversal in the Sky File 2.1.0 FTP server allows remote authenticated users to read files via crafted /null// path commands. The server permits an anonymous FTP account to combine CWD and CDUP navigation with the malformed path without confining resolution to the application directory. Network access to the device's Wi-Fi FTP service and valid anonymous-account credentials are required, and exploitation exposes files without modifying them.

The record

CVE
CVE-2020-36488
Published
Oct 22, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-22, T1533
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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

4.0NIST NVDAV:N/AC:L/Au:S/C:P/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1533Data from Local System

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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