CVE-2020-5551Public exploit

Unauthenticated command execution via Bluetooth memory corruption

Published Mar 30, 2020 · Updated Aug 4, 2024

Memory corruption in Toyota 2017 Model Year DCUs allows physically proximate attackers to execute commands or interrupt the unit via Bluetooth. Two pre-pairing flaws in the in-vehicle Bluetooth service perform a heap out-of-bounds read and a heap-buffer overflow during connection setup. Exploitation requires specialized knowledge, a special tool, and prolonged proximity; some vehicle functions are reachable, but steering, braking, and throttle are not.

CVSS severity8.2
High
EPSS probability1.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in Toyota 2017 Model Year DCUs allows physically proximate attackers to execute commands or interrupt the unit via Bluetooth. Two pre-pairing flaws in the in-vehicle Bluetooth service perform a heap out-of-bounds read and a heap-buffer overflow during connection setup. Exploitation requires specialized knowledge, a special tool, and prolonged proximity; some vehicle functions are reachable, but steering, braking, and throttle are not.

The record

CVE
CVE-2020-5551
Published
Mar 30, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-276, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 30, 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

8.2JPCERT/CCCVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L
6.5JPCERT/CCAV:A/AC:H/Au:N/C:C/I:C/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-276Incorrect Default Permissions
T1210Exploitation of Remote Services

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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