CVE-2020-36248

App-lock bypass via restorable ADB preferences

Published Feb 19, 2021 · Updated Aug 4, 2024

Authentication bypass in ownCloud Android App before 2.15 allows physically proximate attackers to defeat its app lock through an ADB backup. The application permits Android Debug Bridge backup to include the preferences file containing the PIN or pattern and lock-enabled state, which can be edited and restored. Physical access and user interaction are required; successful exploitation exposes files and folders protected only by the app lock.

CVSS severity3.9
Low
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in ownCloud Android App before 2.15 allows physically proximate attackers to defeat its app lock through an ADB backup. The application permits Android Debug Bridge backup to include the preferences file containing the PIN or pattern and lock-enabled state, which can be edited and restored. Physical access and user interaction are required; successful exploitation exposes files and folders protected only by the app lock.

The record

CVE
CVE-2020-36248
Published
Feb 19, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-312, T1552.001
Attack vector
physical
Privileges
Unavailable

Timeline

How it unfolded

  1. Feb 19, 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 vectorphysical
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.6NIST NVDCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.9MITRECVSS:3.1/AV:P/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N
2.1NIST NVDAV:L/AC:L/Au:N/C:P/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)
Vectorphysical
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-312Cleartext Storage of Sensitive Information
T1552.001Unsecured Credentials: Credentials In Files

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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