CISA Advisory ICSA-26-204-03: Defense against Social Engineering in Industrial Control Systems

Vulnerability Overview Vulnerability Name: ICSA-26-204-03 Organization: Secore Summary: These vulnerabilities were reported to CISA. Classification: CSAF Security Advisory CSAF Version: 2.0 Distribution: No Restriction Note: White Language: en-us (United States) Affected Products Category: Other Text: Critical Manufacturing Title: Critical Infrastructure Sector Category: Other Text: Global Title: Country/Region Deployment Category: Other Text: Taiwan Title: Company Headquarters Location Mitigation Category: General Text: CISA recommends users take the following actions to protect themselves against social engineering attacks: - Title: Recommended Practices Category: General Text: Follow the principle of least privilege. - Title: Recommended Practices Category: General Text: Do not click web links in unsolicited email messages or open attachments. - Title: Recommended Practices Category: General Text: Refer to "Identifying and Avoiding Email Scams" for more information. - Title: Recommended Practices Category: General Text: Refer to "Avoiding Social Engineering and Phishing Attacks" for more information. - Title: Recommended Practices Category: General Text: CISA reminds organizations to conduct appropriate impact analysis and risk assessment before deploying mitigations. - Title: Recommended Practices Category: General Text: CISA also provides a section on recommended practices for control system security on the ICS webpage. - Title: Recommended Practices Category: General Text: CISA encourages organizations to implement recommended cybersecurity strategies to proactively defend ICS environments. - Title: Recommended Practices Category: General Text: Additional mitigation guidance and recommended practices are publicly available on the ICS webpage. - Title: Recommended Practices Category: General Text: Organizations that observe suspicious malicious activity should follow established internal procedures and report accordingly. - Title: Recommended Practices Category: General Text: Indicators of known public exploitation specifically targeting these vulnerabilities have been reported to CISA. - Title: Recommended Practices References Category: Self Summary: ICS Advisory ICSA-26-204-03 JSON URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-204-03.json Category: Self Summary: ICSA Advisory ICSA-26-204-03 - Web Version URL: https://www.cisa.gov/news-events/ics-advisories/icsa-26-204-03 Category: External Summary: Recommended Practices URL: https://www.cisa.gov/uscert/sites/default/files/publications/remailscams905.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/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/news-events/ics-alerts/ics-alert-10-381-01 Publisher Category: Coordinator Contact Details: central@cisa.dhs.gov Name: CISA Namespace: https://www.cisa.gov/ Legal Disclaimer Text: This product is subject to this notice (https://www.cisa.gov/notification) and these privacy policy and terms. Title: Legal Notice and Terms of Use Advisory Summary Text: Successful exploitation of these vulnerabilities may allow non-privileged users to escalate privileges or perform other unauthorized actions. Title: Advisory Summary

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CISA Advisory ICSA-26-204-03: Defense against Social Engineering in Industrial Control Systems

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