CVE-2020-12746Network attack vector

Arbitrary code execution via heap overflow

Published May 11, 2020 · Updated Aug 4, 2024

A heap overflow in Samsung Exynos devices on Android O, P, or Q allows attackers to execute code by bypassing Secure Bootloader protection. The vulnerable locus is the Secure Bootloader bootloader, which mishandles heap data and permits a buffer overflow that defeats secure-boot validation. The advisory does not specify attacker access prerequisites; successful exploitation compromises boot integrity and permits arbitrary code execution.

CVSS severity9.8
Critical
EPSS probability1.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A heap overflow in Samsung Exynos devices on Android O, P, or Q allows attackers to execute code by bypassing Secure Bootloader protection. The vulnerable locus is the Secure Bootloader bootloader, which mishandles heap data and permits a buffer overflow that defeats secure-boot validation. The advisory does not specify attacker access prerequisites; successful exploitation compromises boot integrity and permits arbitrary code execution.

The record

CVE
CVE-2020-12746
Published
May 11, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1068
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 11, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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

T1068Exploitation for Privilege Escalation

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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