CVE-2022-20199

NFC tag disclosure via forgeable service nonce

Published Dec 16, 2022 · Updated Apr 21, 2025

Information disclosure in Android 13 NfcService allows local users to read NFC tag data without user interaction. NfcService derives a Tag object's nonce from system time, permits nonce assignment across its AIDL boundary, and retains the nonce after tag disconnection, enabling confused-deputy access. Low-privileged local execution is required; the result is NFC tag data disclosure without data modification or service interruption.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Android 13 NfcService allows local users to read NFC tag data without user interaction. NfcService derives a Tag object's nonce from system time, permits nonce assignment across its AIDL boundary, and retains the nonce after tag disconnection, enabling confused-deputy access. Low-privileged local execution is required; the result is NFC tag data disclosure without data modification or service interruption.

The record

CVE
CVE-2022-20199
Published
Dec 16, 2022
Updated
Apr 21, 2025
Vendor
Google Cloud
Product
Android
Classifications
CWE-610
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 16, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 21, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=Android-13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Google Cloud · Androidversion=Android-13

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
5.5CISA-ADPCVSS:3.1/AV:L/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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-610Externally Controlled Reference to a Resource in Another Sphere

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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