ICSA-26-246-01
Vulnerability from csaf_cisa - Published: 2026-09-03 06:00 - Updated: 2026-09-03 06:00Summary
OPCFoundation OPC UA LocalDiscoveryServer (LDS)
Notes
Legal Notice and Terms of Use: This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).
Advisory Summary: Successful exploitation of this vulnerability could allow an attacker to take control of a high-privilege terminal during installation and run arbitrary commands.
Critical infrastructure sectors: Chemical, Energy, Food and Agriculture, Water and Wastewater, Critical Manufacturing
Countries/areas deployed: Worldwide
Company headquarters location: United States
Recommended Practices: CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
Recommended Practices: CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Recommended Practices: CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.
Recommended Practices: Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.
Recommended Practices: Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
Recommended Practices: CISA also recommends users take the following measures to protect themselves from social engineering attacks: Do not click web links or open attachments in unsolicited email messages. Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams. Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.
Recommended Practices: No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. This vulnerability is not exploitable remotely.
References
16 references
{
"document": {
"acknowledgments": [
{
"names": [
"Lukas Schumaker"
],
"organization": "Rockwell Automation",
"summary": "reported this vulnerability to OPCFoundation"
},
{
"organization": "OPCFoundation",
"summary": "reported this vulnerability to CISA"
}
],
"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"text": "Disclosure is not limited",
"tlp": {
"label": "WHITE",
"url": "https://www.cisa.gov/news-events/news/traffic-light-protocol-tlp-definitions-and-usage"
}
},
"lang": "en-US",
"notes": [
{
"category": "legal_disclaimer",
"text": "This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy \u0026 Use policy (https://www.cisa.gov/privacy-policy).",
"title": "Legal Notice and Terms of Use"
},
{
"category": "summary",
"text": "Successful exploitation of this vulnerability could allow an attacker to take control of a high-privilege terminal during installation and run arbitrary commands.",
"title": "Advisory Summary"
},
{
"category": "other",
"text": "Chemical, Energy, Food and Agriculture, Water and Wastewater, Critical Manufacturing",
"title": "Critical infrastructure sectors"
},
{
"category": "other",
"text": "Worldwide",
"title": "Countries/areas deployed"
},
{
"category": "other",
"text": "United States",
"title": "Company headquarters location"
},
{
"category": "general",
"text": "CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.",
"title": "Recommended Practices"
},
{
"category": "general",
"text": "CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.",
"title": "Recommended Practices"
},
{
"category": "general",
"text": "CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.",
"title": "Recommended Practices"
},
{
"category": "general",
"text": "Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.",
"title": "Recommended Practices"
},
{
"category": "general",
"text": "Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.",
"title": "Recommended Practices"
},
{
"category": "general",
"text": "CISA also recommends users take the following measures to protect themselves from social engineering attacks: Do not click web links or open attachments in unsolicited email messages. Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams. Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.",
"title": "Recommended Practices"
},
{
"category": "general",
"text": "No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. This vulnerability is not exploitable remotely.",
"title": "Recommended Practices"
}
],
"publisher": {
"category": "coordinator",
"contact_details": "central@cisa.dhs.gov",
"name": "CISA",
"namespace": "https://www.cisa.gov/"
},
"references": [
{
"category": "self",
"summary": "ICS Advisory ICSA-26-246-01 JSON",
"url": "https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-246-01.json"
},
{
"category": "self",
"summary": "ICSA Advisory ICSA-26-246-01 - Web Version",
"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-246-01"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/resources-tools/resources/ics-recommended-practices"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/sites/default/files/publications/Cybersecurity_Best_Practices_for_Industrial_Control_Systems.pdf"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/topics/industrial-control-systems"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/uscert/sites/default/files/publications/emailscams0905.pdf"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/uscert/ncas/tips/ST04-014"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/news-events/news/targeted-cyber-intrusion-detection-and-mitigation-strategies-update-b"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/secure-our-world/teach-employees-avoid-phishing"
},
{
"category": "external",
"summary": "Recommended Practices",
"url": "https://www.cisa.gov/news-events/news/avoiding-social-engineering-and-phishing-attacks"
}
],
"title": "OPCFoundation OPC UA LocalDiscoveryServer (LDS)",
"tracking": {
"current_release_date": "2026-09-03T06:00:00.000000Z",
"generator": {
"date": "2026-09-01T15:24:17.114448Z",
"engine": {
"name": "CISA CSAF Generator",
"version": "1.0.0"
}
},
"id": "ICSA-26-246-01",
"initial_release_date": "2026-09-03T06:00:00.000000Z",
"revision_history": [
{
"date": "2026-09-03T06:00:00.000000Z",
"legacy_version": "Initial",
"number": "1",
"summary": "Initial Publication"
}
],
"status": "final",
"version": "1"
}
},
"product_tree": {
"branches": [
{
"branches": [
{
"branches": [
{
"category": "product_version_range",
"name": "\u003c1.04.420",
"product": {
"name": "OPCFoundation UA-LDS-Installers: \u003c1.04.420",
"product_id": "CSAFPID-0001"
}
}
],
"category": "product_name",
"name": "UA-LDS-Installers"
}
],
"category": "vendor",
"name": "OPCFoundation"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2026-77477",
"cwe": {
"id": "CWE-250",
"name": "Execution with Unnecessary Privileges"
},
"notes": [
{
"category": "summary",
"text": "An attacker can intercept a high-privilege console window launched during installation of the LDS. The attacker must be able to launch an installer with elevated privileges and have access to the keyboard and display while the installation is taking place.",
"title": "Vulnerability Summary"
},
{
"category": "details",
"text": "SSVCv2/E:N/A:N/2026-09-01T06:00:00.000000Z",
"title": "SSVC"
}
],
"product_status": {
"known_affected": [
"CSAFPID-0001"
]
},
"references": [
{
"category": "external",
"summary": "cwe.mitre.org",
"url": "https://cwe.mitre.org/data/definitions/250.html"
},
{
"category": "external",
"summary": "www.cve.org",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-77477"
},
{
"category": "external",
"summary": "www.first.org",
"url": "https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
},
{
"category": "external",
"summary": "www.first.org",
"url": "https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N"
}
],
"remediations": [
{
"category": "mitigation",
"details": "OPCFoundation recommends users update to OPC UA LDS Installers 1.04.420 or later.",
"product_ids": [
"CSAFPID-0001"
]
},
{
"category": "mitigation",
"details": "For more information about this vulnerability and its mitigation, see the OPCFoundation security advisory.",
"product_ids": [
"CSAFPID-0001"
],
"url": "https://github.com/OPCFoundation/OPC-SecurityAdvisories/tree/latest/csaf/2026/009"
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 4.6,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
"version": "3.1"
},
"products": [
"CSAFPID-0001"
]
}
]
}
]
}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
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- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.