CVE-2022-26303Public exploitNetwork attack vector

Unauthenticated account creation via SecureAddUser messages

Published May 25, 2022 · Updated Apr 15, 2025

Missing authentication in OAS Platform 16.00.0112 allows remote attackers to create OAS user accounts through network requests. OAS Engine processes properly formatted SecureAddUser and SecureConfigValues messages on its configuration service without authenticating the sender. Network access to TCP port 58727, used by default, is sufficient to create an account and assign a custom security group whose permissions govern subsequent authenticated requests.

CVSS severity7.5
High
EPSS probability1.26%
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

Missing authentication in OAS Platform 16.00.0112 allows remote attackers to create OAS user accounts through network requests. OAS Engine processes properly formatted SecureAddUser and SecureConfigValues messages on its configuration service without authenticating the sender. Network access to TCP port 58727, used by default, is sufficient to create an account and assign a custom security group whose permissions govern subsequent authenticated requests.

The record

CVE
CVE-2022-26303
Published
May 25, 2022
Updated
Apr 15, 2025
Vendor
Open Automation Software
Product
OAS Platform
Classifications
CWE-306, T1136
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 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=V16.00.0112

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Open Automation Software · OAS Platformversion=V16.00.0112

Published CVSS scores

7.5Cisco TalosCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
5.0NVDAV:N/AC:L/Au:N/C:N/I:P/A:N
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1136Create Account

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