CVE-2023-2866

Server takeover via crafted ZIP loading

Published Jun 7, 2023 · Updated Jan 16, 2025

Code execution in Advantech WebAccess/SCADA 8.4.5 allows context-dependent attackers to control the SCADA server via a crafted ZIP file. CISA identifies the WebAccess Dashboard package and WADashboardSetup.msi as the affected locus but does not disclose how archive contents become a web shell. Exploitation requires an authenticated user to load the attacker-supplied archive, after which the web shell grants control of the server.

CVSS severity7.8
High
EPSS probability0.14%
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

Code execution in Advantech WebAccess/SCADA 8.4.5 allows context-dependent attackers to control the SCADA server via a crafted ZIP file. CISA identifies the WebAccess Dashboard package and WADashboardSetup.msi as the affected locus but does not disclose how archive contents become a web shell. Exploitation requires an authenticated user to load the attacker-supplied archive, after which the web shell grants control of the server.

The record

CVE
CVE-2023-2866
Published
Jun 7, 2023
Updated
Jan 16, 2025
Vendor
Advantech
Product
WebAccess/SCADA
Classifications
CWE-345, CWE-351, T1505.003, T1204.002
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 7, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 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=8.4.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Advantech · WebAccess/SCADAversion=8.4.5

Published CVSS scores

7.3ICS-CERTCVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/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
CWE-351Insufficient Type Distinction
T1505.003Server Software Component: Web Shell
T1204.002User Execution: Malicious File

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