CVE-2024-38434Public exploitNetwork attack vector

Authenticated project disclosure via PCOM password reset

Published Jul 21, 2024 · Updated Aug 2, 2024

Authentication bypass in Unitronics Vision PLC before 9.9.1 allows remote authenticated users to read password-protected PLC projects. PCOM opcode 0x42 resets the Upload Password when specially invoked, defeating the check that blocks project uploads. The PLC must expose PCOM and contain a burned project; successful exploitation discloses that project without its upload password.

CVSS severity6.5
Medium
EPSS probability0.44%
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

Authentication bypass in Unitronics Vision PLC before 9.9.1 allows remote authenticated users to read password-protected PLC projects. PCOM opcode 0x42 resets the Upload Password when specially invoked, defeating the check that blocks project uploads. The PLC must expose PCOM and contain a burned project; successful exploitation discloses that project without its upload password.

The record

CVE
CVE-2024-38434
Published
Jul 21, 2024
Updated
Aug 2, 2024
Vendor
Unitronics
Product
Vision PLC
Classifications
CWE-676, T1556
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 21, 2024CVE 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

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 versions <Upgrade to v9.9.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Unitronics · Vision PLCversion=All versions <Upgrade to v9.9.1

Published CVSS scores

6.5Israel National Cyber DirectorateCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-676Use of Potentially Dangerous Function
T1556Modify Authentication Process

Public exploit references

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