CVE-2024-20821

Security-feature bypass via privileged OTP reconfiguration

Published May 7, 2024 · Updated Aug 1, 2024

OTP reconfiguration in Samsung Exynos 1330, 1380, and 2400 allows local users with TEE control to place devices in RMA mode. Samsung has not identified the component or validation failure that permits one-time-programmable configuration to be changed. Exploitation requires privileged TEE control and disables security features by transitioning the device into RMA mode.

CVSS severity4.4
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OTP reconfiguration in Samsung Exynos 1330, 1380, and 2400 allows local users with TEE control to place devices in RMA mode. Samsung has not identified the component or validation failure that permits one-time-programmable configuration to be changed. Exploitation requires privileged TEE control and disables security features by transitioning the device into RMA mode.

The record

CVE
CVE-2024-20821
Published
May 7, 2024
Updated
Aug 1, 2024
Vendor
Samsung Electronics
Product
Exynos 1330
Classifications
T1629
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. May 7, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=-

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Samsung Electronics · Exynos 1330version=-
Samsung Electronics Co., Ltd. · Samsung Mobile DevicesAffected versions are unavailable in this record.
Samsung Electronics · Exynos 2400version=-
Samsung Electronics · Exynos 1380version=-

Published CVSS scores

4.4Samsung MobileCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/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)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1629Impair Defenses

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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