CVE-2021-25474

Permanent device denial of service via unhandled setting

Published Oct 6, 2021 · Updated Aug 3, 2024

Improper exception handling in Samsung Mobile Devices SystemUI before SMR Oct-2021 Release 1 allows local users to cause permanent denial of service. SystemUI fails to handle an exceptional multi_sim_bar_show_on_qspanel setting value, causing a crash that leaves the device unusable. The attack requires shell privileges, and recovery requires a factory reset that erases device state.

CVSS severity4.4
Medium
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper exception handling in Samsung Mobile Devices SystemUI before SMR Oct-2021 Release 1 allows local users to cause permanent denial of service. SystemUI fails to handle an exceptional multi_sim_bar_show_on_qspanel setting value, causing a crash that leaves the device unusable. The attack requires shell privileges, and recovery requires a factory reset that erases device state.

The record

CVE
CVE-2021-25474
Published
Oct 6, 2021
Updated
Aug 3, 2024
Vendor
Samsung Electronics Co., Ltd.
Product
Samsung Mobile Devices
Classifications
CWE-755, T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Oct 6, 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?

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

  1. Affected versionversion=Q(10.0), R(11.0) <SMR Oct-2021 Release 1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Samsung Electronics Co., Ltd. · Samsung Mobile Devicesversion=Q(10.0), R(11.0) <SMR Oct-2021 Release 1

Published CVSS scores

4.4Samsung MobileCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
4.9NIST NVDAV:L/AC:L/Au:N/C:N/I:N/A:C

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)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-755Improper Handling of Exceptional Conditions
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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