CVE-2023-23435

System file overwrite via improper signature verification

Published Dec 29, 2023 · Updated Aug 2, 2024

Improper signature verification in HONOR MagicOS 7.1.0.127 allows local users to replace a valid system file with a forged file. The signature-management path accepts a forged system file and permits it to overwrite the correct file, but HONOR has not disclosed the responsible component or exact validation error. Exploitation requires local access; file replacement can corrupt system content, while published assessments disagree on whether integrity or only availability is affected.

CVSS severity7.1
High
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper signature verification in HONOR MagicOS 7.1.0.127 allows local users to replace a valid system file with a forged file. The signature-management path accepts a forged system file and permits it to overwrite the correct file, but HONOR has not disclosed the responsible component or exact validation error. Exploitation requires local access; file replacement can corrupt system content, while published assessments disagree on whether integrity or only availability is affected.

The record

CVE
CVE-2023-23435
Published
Dec 29, 2023
Updated
Aug 2, 2024
Vendor
HONOR
Product
MagicOS
Classifications
CWE-347, T1565.001
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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=7.1.0.127 <7.1.0.137

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

HONOR · MagicOSversion=7.1.0.127 <7.1.0.137

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
4.0HONORCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-347Improper Verification of Cryptographic Signature
T1565.001Stored Data Manipulation

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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