CVE-2021-38483

Local privilege escalation via writable binaries

Published Apr 20, 2022 · Updated Apr 16, 2025

Incorrect permission assignment in FANUC Corporation ROBOGUIDE before 9.40083.00.05 (Rev T) allows local users to gain elevated privileges. ROBOGUIDE assigns unsafe permissions to installed binaries, allowing a local user to overwrite an executable that later runs with SYSTEM rights. Exploitation requires local low-privileged access and user interaction; successful abuse permits file modification at elevated privilege.

CVSS severity6.0
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Incorrect permission assignment in FANUC Corporation ROBOGUIDE before 9.40083.00.05 (Rev T) allows local users to gain elevated privileges. ROBOGUIDE assigns unsafe permissions to installed binaries, allowing a local user to overwrite an executable that later runs with SYSTEM rights. Exploitation requires local low-privileged access and user interaction; successful abuse permits file modification at elevated privilege.

The record

CVE
CVE-2021-38483
Published
Apr 20, 2022
Updated
Apr 16, 2025
Vendor
FANUC Corporation
Product
ROBOGUIDE
Classifications
CWE-732, T1574
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 20, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=All <v9.40083.00.05 (Rev T)

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

FANUC Corporation · ROBOGUIDEversion=All <v9.40083.00.05 (Rev T)

Published CVSS scores

5.7NIST NVDCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H
3.3NIST NVDAV:L/AC:M/Au:N/C:N/I:P/A:P
6.0ICS-CERTCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/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-732Incorrect Permission Assignment for Critical Resource
T1574Hijack Execution Flow

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo