CVE-2020-0050

Local privilege escalation via NFC message underflow

Published Mar 10, 2020 · Updated Aug 4, 2024

Out-of-bounds write in the Android 10 NFC server allows local users to escalate privileges via a crafted NFC message. The nfa_hciu_send_msg function in nfa_hci_utils.cc subtracts an unvalidated message length, permitting an integer underflow before an out-of-bounds buffer write. Exploitation requires local System execution privileges, needs no user interaction, and can compromise the NFC server process.

CVSS severity6.7
Medium
EPSS probability0.16%
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 the Android 10 NFC server allows local users to escalate privileges via a crafted NFC message. The nfa_hciu_send_msg function in nfa_hci_utils.cc subtracts an unvalidated message length, permitting an integer underflow before an out-of-bounds buffer write. Exploitation requires local System execution privileges, needs no user interaction, and can compromise the NFC server process.

The record

CVE
CVE-2020-0050
Published
Mar 10, 2020
Updated
Aug 4, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-20, CWE-787, T1404
Attack vector
local
Privileges
admin

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-10

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Google Cloud · Androidversion=Android-10

Published CVSS scores

4.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:P
6.7NIST NVDCVSS:3.1/AV:L/AC:L/PR:H/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.

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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)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-787Out-of-bounds Write
T1404Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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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