CVE-2023-43800

Local privilege escalation via unverified component replacement

Published Oct 18, 2023 · Updated Sep 12, 2024

Privilege escalation in Arduino Cloud Agent 1.3.2 and earlier allows local users to execute code via a crafted localhost HTTP POST request. The /v2/pkgs/tools/installed handler accepts component data without verifying its authenticity, allowing an installed tool component to be replaced and invoked. Access requires local HTTP reachability or a CORS-policy bypass; code runs with the account privileges of the Agent service.

CVSS severity7.3
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in Arduino Cloud Agent 1.3.2 and earlier allows local users to execute code via a crafted localhost HTTP POST request. The /v2/pkgs/tools/installed handler accepts component data without verifying its authenticity, allowing an installed tool component to be replaced and invoked. Access requires local HTTP reachability or a CORS-policy bypass; code runs with the account privileges of the Agent service.

The record

CVE
CVE-2023-43800
Published
Oct 18, 2023
Updated
Sep 12, 2024
Vendor
Arduino
Product
Arduino Cloud Agent
Classifications
CWE-345, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 18, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 12, 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=< 1.3.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Arduino · Arduino Cloud Agentversion=< 1.3.3

Published CVSS scores

7.3GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
7.3ArduinoCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
7.8NISTCVSS: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-345Insufficient Verification of Data Authenticity
T1068Exploitation for Privilege Escalation

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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