CVE-2023-42740

Local privilege escalation via unchecked permission-record writes

Published Dec 4, 2023 · Updated Oct 11, 2024

Missing authorization in Unisoc Android telecom service allows local users to alter app permission-usage records and escalate privileges. The service writes an application's permission-usage records without checking whether the caller is authorized to make that change. A locally running app needs no additional execution privileges or user interaction; the vendor reports integrity and availability impact, while the precise elevated capability remains undisclosed.

CVSS severity5.1
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

Missing authorization in Unisoc Android telecom service allows local users to alter app permission-usage records and escalate privileges. The service writes an application's permission-usage records without checking whether the caller is authorized to make that change. A locally running app needs no additional execution privileges or user interaction; the vendor reports integrity and availability impact, while the precise elevated capability remains undisclosed.

The record

CVE
CVE-2023-42740
Published
Dec 4, 2023
Updated
Oct 11, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-862, T1404
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 11, 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 vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.1UnisocCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1404Exploitation for Privilege Escalation

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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