CVE-2021-0925Network attack vector

Remote information disclosure via NFC bounds check

Published Dec 15, 2021 · Updated Aug 3, 2024

Out-of-bounds read in Google Cloud Android 12 System NFC code allows remote attackers to disclose information through crafted Type 4 Tag data. The rw_t4t_sm_detect_ndef state handler in rw_t4t.cc applies an incorrect bounds check while processing a mismatched NFC tag response, allowing data beyond the expected buffer to affect observable behavior. Exploitation requires no privileges or user interaction, and disclosure is limited to information inferred from that behavior change.

CVSS severity7.5
High
EPSS probability0.96%
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 Google Cloud Android 12 System NFC code allows remote attackers to disclose information through crafted Type 4 Tag data. The rw_t4t_sm_detect_ndef state handler in rw_t4t.cc applies an incorrect bounds check while processing a mismatched NFC tag response, allowing data beyond the expected buffer to affect observable behavior. Exploitation requires no privileges or user interaction, and disclosure is limited to information inferred from that behavior change.

The record

CVE
CVE-2021-0925
Published
Dec 15, 2021
Updated
Aug 3, 2024
Vendor
Google Cloud
Product
Android
Classifications
CWE-125
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 15, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

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  1. Affected versionversion=Android-12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Androidversion=Android-12

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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