CVE-2019-11516Public exploit

Code execution via oversized Bluetooth inquiry responses

Published Feb 5, 2020 · Updated Aug 4, 2024

Heap-based buffer overflow in the Cypress Wireless IoT Bluetooth codebase allows physically proximate attackers to execute code during inquiry. eir_handleRx retains RFU bits in an EIR length, letting eir_getReceivedEIR copy more than the expected 240 bytes and create a heap write-what-where condition. Exploitation requires repeated short-interval connections from different source addresses while the victim scans for device names.

CVSS severity8.1
High
EPSS probability0.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in the Cypress Wireless IoT Bluetooth codebase allows physically proximate attackers to execute code during inquiry. eir_handleRx retains RFU bits in an EIR length, letting eir_getReceivedEIR copy more than the expected 240 bytes and create a heap write-what-where condition. Exploitation requires repeated short-interval connections from different source addresses while the victim scans for device names.

The record

CVE
CVE-2019-11516
Published
Feb 5, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1203
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 5, 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?

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

8.1NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

Public exploit references

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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