CVE-2025-23420

Local code execution via undisclosed runtime bounds error

Published Mar 4, 2025 · Updated Mar 11, 2025

Out-of-bounds write in OpenHarmony 4.1.0 through 5.0.2 allows local users to execute arbitrary code in pre-installed apps. The flaw is in ArkCompiler ETS Runtime, but OpenHarmony has not published the affected function, malformed input, or incorrect bounds operation. Exploitation requires low local privileges and restricted, undisclosed conditions; the vendor's CVSS assessment records only low confidentiality impact.

CVSS severity3.8
Low
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in OpenHarmony 4.1.0 through 5.0.2 allows local users to execute arbitrary code in pre-installed apps. The flaw is in ArkCompiler ETS Runtime, but OpenHarmony has not published the affected function, malformed input, or incorrect bounds operation. Exploitation requires low local privileges and restricted, undisclosed conditions; the vendor's CVSS assessment records only low confidentiality impact.

The record

CVE
CVE-2025-23420
Published
Mar 4, 2025
Updated
Mar 11, 2025
Vendor
OpenHarmony
Product
OpenHarmony
Classifications
CWE-787, T1203
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 11, 2025Record 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=v4.1.0 <=v5.0.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

OpenHarmony · OpenHarmonyversion=v4.1.0 <=v5.0.2

Published CVSS scores

3.8OpenHarmonyCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

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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