CVE-2021-0580

Information disclosure via Wi-Fi driver integer underflow

Published Aug 17, 2021 · Updated Aug 3, 2024

Integer underflow in MediaTek Wi-Fi drivers for Android 8.1 through 11 allows physically proximate attackers to disclose memory. The driver fails to check a buffer boundary after an integer underflow, causing a read beyond the intended buffer. The attacker must be near the device, but needs no execution privileges or user interaction; the reported consequence is information disclosure only.

CVSS severity6.5
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer underflow in MediaTek Wi-Fi drivers for Android 8.1 through 11 allows physically proximate attackers to disclose memory. The driver fails to check a buffer boundary after an integer underflow, causing a read beyond the intended buffer. The attacker must be near the device, but needs no execution privileges or user interaction; the reported consequence is information disclosure only.

The record

CVE
CVE-2021-0580
Published
Aug 17, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-191, CWE-125
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 17, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.3NIST NVDAV:A/AC:L/Au:N/C:P/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-191Integer Underflow
CWE-125Out-of-bounds Read

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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