CVE-2025-59440Network attack vector

Service interruption via mishandled SIM proactive commands

Published Apr 6, 2026 · Updated Apr 6, 2026

Denial of service in Samsung Exynos USIM firmware allows remote attackers to interrupt modem operation via SIM proactive commands. The USIM component improperly handles a proactive command, but Samsung has not disclosed the affected parser, command type, or failing resource operation. No privileges or user interaction are required; the reported consequence is limited to availability, with no disclosed data access or modification.

CVSS severity7.5
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Samsung Exynos USIM firmware allows remote attackers to interrupt modem operation via SIM proactive commands. The USIM component improperly handles a proactive command, but Samsung has not disclosed the affected parser, command type, or failing resource operation. No privileges or user interaction are required; the reported consequence is limited to availability, with no disclosed data access or modification.

The record

CVE
CVE-2025-59440
Published
Apr 6, 2026
Updated
Apr 6, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-400, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 6, 2026Record 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

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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

CWE-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

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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