CVE-2020-0039Network attack vector

Remote information disclosure via unchecked NFC block length

Published Mar 10, 2020 · Updated Aug 4, 2024

Out-of-bounds read in Android 8.0, 8.1, 9, and 10 allows remote attackers to disclose uninitialized NFC stack memory without interaction. In rw_i93_sm_update_ndef in rw_i93.cc, a short ISO 15693 NDEF buffer reaches the single-block write path before its length is checked against the tag block size. NFC reachability and no execution privileges are required; the documented consequence is information disclosure only.

CVSS severity7.5
High
EPSS probability1.15%
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 read in Android 8.0, 8.1, 9, and 10 allows remote attackers to disclose uninitialized NFC stack memory without interaction. In rw_i93_sm_update_ndef in rw_i93.cc, a short ISO 15693 NDEF buffer reaches the single-block write path before its length is checked against the tag block size. NFC reachability and no execution privileges are required; the documented consequence is information disclosure only.

The record

CVE
CVE-2020-0039
Published
Mar 10, 2020
Updated
Aug 4, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 10, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

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

Published CVSS scores

7.8NIST NVDAV:N/AC:L/Au:N/C:C/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

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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