CVE-2020-0070

Code execution via unchecked NFC lock index

Published Apr 17, 2020 · Updated Aug 4, 2024

Out-of-bounds write in Android 8.0, 8.1, 9, and 10 allows physically proximate attackers to execute code through a crafted NFC tag. In rw_t2t_update_lock_attributes, a tag-controlled lock value repeatedly advances block_count and indexes the fixed lock_attr array without a bounds check. NFC proximity is required, but no user interaction or execution privilege is needed, and successful exploitation runs code in the NFC daemon.

CVSS severity9.8
Critical
EPSS probability1.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Android 8.0, 8.1, 9, and 10 allows physically proximate attackers to execute code through a crafted NFC tag. In rw_t2t_update_lock_attributes, a tag-controlled lock value repeatedly advances block_count and indexes the fixed lock_attr array without a bounds check. NFC proximity is required, but no user interaction or execution privilege is needed, and successful exploitation runs code in the NFC daemon.

The record

CVE
CVE-2020-0070
Published
Apr 17, 2020
Updated
Aug 4, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-787, T1658
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 17, 2020CVE 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?

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

  1. Affected versionversion=Android-8.0 Android-8.1 Android-9 Android-10

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Google Cloud · Androidversion=Android-8.0 Android-8.1 Android-9 Android-10

Published CVSS scores

10.0NIST NVDAV:N/AC:L/Au:N/C:C/I:C/A:C
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1658Exploitation for Client Execution

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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