{"vulnerability": "CVE-2026-35504", "sightings": [{"uuid": "2ce72ff1-2418-41d9-8b00-3ccde125474d", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-35504", "type": "seen", "source": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-132-02", "content": "View CSAF\n\nSummary\n\nSuccessful exploitation of these vulnerabilities could allow an authenticated attacker to expose sensitive information or cause a CRLF injection.\n\nThe following versions of Subnet Solutions PowerSYSTEM Center are affected:\n\n\n\nPowerSYSTEM Center 2020 <=5.28.x (CVE-2026-35504)\n\nPowerSYSTEM Center 2020 >=5.8.x|<=5.28.x (CVE-2026-26289)\n\nPowerSYSTEM Center 2020 >=5.11.x|<=5.28.x (CVE-2026-33570)\n\nPowerSYSTEM Center 2024 >=6.0.x|<=6.1.x (CVE-2026-26289, CVE-2026-35555, CVE-2026-35504)\n\nPowerSYSTEM Center 2026 7.0.x (CVE-2026-26289, CVE-2026-35555, CVE-2026-35504)\n\n<div class=\"csaf-table\">\n\n\n\n\nCVSS\nVendor\nEquipment\nVulnerabilities\n\n\n\n\nv3 8.2\nSubnet Solutions Inc.\nSubnet Solutions PowerSYSTEM Center\nIncorrect Authorization, Improper Neutralization of CRLF Sequences ('CRLF Injection')\n\n\n\n</div>\n\nBackground\n\n\n\nCritical Infrastructure Sectors: Critical Manufacturing, Energy\n\nCountries/Areas Deployed: Worldwide\n\nCompany Headquarters Location: Canada\n\n\n\n\nVulnerabilities\n<div class=\"csaf-accordion\">\n\nExpand All +\n<div class=\"csaf-accordion-item\">\n\nCVE-2026-26289\n<div class=\"csaf-accordion-content\">\n\nPowerSYSTEM Center REST API endpoint for device account export allows an authenticated user with limited permissions to expose sensitive information normally restricted to administrative permissions only.\n\nView CVE Details\n\n\n\nAffected Products\n\nSubnet Solutions PowerSYSTEM Center\n<div class=\"ics-vendor-version-status\">\n<div class=\"ics-vendor\">Vendor:Subnet Solutions Inc.</div>\n<div class=\"ics-version\">Product Version:Subnet Solutions Inc. PowerSYSTEM Center 2020: >=5.8.x|<=5.28.x, Subnet Solutions Inc. PowerSYSTEM Center 2024: >=6.0.x|<=6.1.x, Subnet Solutions Inc. PowerSYSTEM Center 2026: 7.0.x</div>\n<div class=\"ics-status\">Product Status:known_affected</div>\n</div>\n<div class=\"ics-remediations\">\n\nRemediations\n\nMitigationSubnet Solutions recommends users update to the latest version of PowerSYSTEM Center PSC 2020 Update 29, PSC 2024 Update 2, and PSC 2026 GA Hotfix.\n\nMitigationFor assistance in upgrading, users should contact a Subnet Solutions System Integration team member or customer support team at (403) 270-8885 or by email at support@subnet.com.mailto:support@subnet.com\n\nMitigationSubnet Solutions recommends users do the following in order to reduce risk:Monitor user activity records to ensure users are following acceptable usage policies of the application.Restrict access to Notification Settings to trusted Administrators Monitor \"Send from Address\" in settings and Activity Records.Configure a notification rule that triggers in any bulk account export activity.\n</div>\n\nRelevant CWE: CWE-863 Incorrect Authorization\n\n\n\nMetrics\n<div class=\"csaf-table csaf-metrics-table\">\n\n\n\n\nCVSS Version\nBase Score\nBase Severity\nVector String\n\n\n\n\n3.1\n8.2\nHIGH\nCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L\n\n\n\n</div>\n</div>\n</div>\n<div class=\"csaf-accordion-item\">\n\nCVE-2026-33570\n<div class=\"csaf-accordion-content\">\n\nPowerSYSTEM Center REST API endpoint for devices allows a low privilege authenticated user to access information normally limited by operational permissions.\n\nView CVE Details\n\n\n\nAffected Products\n\nSubnet Solutions PowerSYSTEM Center\n<div class=\"ics-vendor-version-status\">\n<div class=\"ics-vendor\">Vendor:Subnet Solutions Inc.</div>\n<div class=\"ics-version\">Product Version:Subnet Solutions Inc. PowerSYSTEM Center 2020: >=5.11.x|<=5.28.x</div>\n<div class=\"ics-status\">Product Status:known_affected</div>\n</div>\n<div class=\"ics-remediations\">\n\nRemediations\n\nMitigationSubnet Solutions recommends users update to the latest version of PowerSYSTEM Center PSC 2020 Update 29, PSC 2024 Update 2, and PSC 2026 GA Hotfix.\n\nMitigationFor assistance in upgrading, users should contact a Subnet Solutions System Integration team member or customer support team at (403) 270-8885 or by email at support@subnet.com.mailto:support@subnet.com\n\nMitigationSubnet Solutions recommends users do the following in order to reduce risk:Monitor user activity records to ensure users are following acceptable usage policies of the application.Restrict access to Notification Settings to trusted Administrators Monitor \"Send from Address\" in settings and Activity Records.Configure a notification rule that triggers in any bulk account export activity.\n</div>\n\nRelevant CWE: CWE-863 Incorrect Authorization\n\n\n\nMetrics\n<div class=\"csaf-table csaf-metrics-table\">\n\n\n\n\nCVSS Version\nBase Score\nBase Severity\nVector String\n\n\n\n\n3.1\n5.7\nMEDIUM\nCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N\n\n\n\n</div>\n</div>\n</div>\n<div class=\"csaf-accordion-item\">\n\nCVE-2026-35555\n<div class=\"csaf-accordion-content\">\n\nPowerSYSTEM Center feature for device project groups allows an authenticated user with limited permissions to perform an unauthorized deletion of project groups.\n\nView CVE Details\n\n\n\nAffected Products\n\nSubnet Solutions PowerSYSTEM Center\n<div class=\"ics-vendor-version-status\">\n<div class=\"ics-vendor\">Vendor:Subnet Solutions Inc.</div>\n<div class=\"ics-version\">Product Version:Subnet Solutions Inc. PowerSYSTEM Center 2024: >=6.0.x|<=6.1.x, Subnet Solutions Inc. PowerSYSTEM Center 2026: 7.0.x</div>\n<div class=\"ics-status\">Product Status:known_affected</div>\n</div>\n<div class=\"ics-remediations\">\n\nRemediations\n\nMitigationSubnet Solutions recommends users update to the latest version of PowerSYSTEM Center PSC 2020 Update 29, PSC 2024 Update 2, and PSC 2026 GA Hotfix.\n\nMitigationFor assistance in upgrading, users should contact a Subnet Solutions System Integration team member or customer support team at (403) 270-8885 or by email at support@subnet.com.mailto:support@subnet.com\n\nMitigationSubnet Solutions recommends users do the following in order to reduce risk:Monitor user activity records to ensure users are following acceptable usage policies of the application.Restrict access to Notification Settings to trusted Administrators Monitor \"Send from Address\" in settings and Activity Records.Configure a notification rule that triggers in any bulk account export activity.\n</div>\n\nRelevant CWE: CWE-863 Incorrect Authorization\n\n\n\nMetrics\n<div class=\"csaf-table csaf-metrics-table\">\n\n\n\n\nCVSS Version\nBase Score\nBase Severity\nVector String\n\n\n\n\n3.1\n6.3\nMEDIUM\nCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L\n\n\n\n</div>\n</div>\n</div>\n<div class=\"csaf-accordion-item\">\n\nCVE-2026-35504\n<div class=\"csaf-accordion-content\">\n\nPowerSYSTEM Center email notification service is affected by a CRLF injection vulnerability when using SMTPS communication.\n\nView CVE Details\n\n\n\nAffected Products\n\nSubnet Solutions PowerSYSTEM Center\n<div class=\"ics-vendor-version-status\">\n<div class=\"ics-vendor\">Vendor:Subnet Solutions Inc.</div>\n<div class=\"ics-version\">Product Version:Subnet Solutions Inc. PowerSYSTEM Center 2020: <=5.28.x, Subnet Solutions Inc. PowerSYSTEM Center 2024: >=6.0.x|<=6.1.x, Subnet Solutions Inc. PowerSYSTEM Center 2026: 7.0.x</div>\n<div class=\"ics-status\">Product Status:known_affected</div>\n</div>\n<div class=\"ics-remediations\">\n\nRemediations\n\nMitigationSubnet Solutions recommends users update to the latest version of PowerSYSTEM Center PSC 2020 Update 29, PSC 2024 Update 2, and PSC 2026 GA Hotfix.\n\nMitigationFor assistance in upgrading, users should contact a Subnet Solutions System Integration team member or customer support team at (403) 270-8885 or by email at support@subnet.com.mailto:support@subnet.com\n\nMitigationSubnet Solutions recommends users do the following in order to reduce risk:Monitor user activity records to ensure users are following acceptable usage policies of the application.Restrict access to Notification Settings to trusted Administrators Monitor \"Send from Address\" in settings and Activity Records.Configure a notification rule that triggers in any bulk account export activity.\n</div>\n\nRelevant CWE: CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')\n\n\n\nMetrics\n<div class=\"csaf-table csaf-metrics-table\">\n\n\n\n\nCVSS Version\nBase Score\nBase Severity\nVector String\n\n\n\n\n3.1\n5.5\nMEDIUM\nCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L\n\n\n\n</div>\n</div>\n</div>\n</div>\n\n\n\nAcknowledgments\n\n\n\nKelly Stich of Subnet Solutions Inc reported these vulnerabilities to CISA\n\n\n\n\nLegal Notice and Terms of Use\n\nThis product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).\n\n\n\nRecommended Practices\n\nCISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities.\n\nMinimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the Internet.\n\nLocate control system networks and remote devices behind firewalls and isolating them from business networks.\n\nWhen remote access is required, use more secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as the connected devices.\n\nCISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.\n\nCISA 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.\n\nCISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.\n\nAdditional 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.\n\nOrganizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.\n\nCISA also recommends users take the following measures to protect themselves from social engineering attacks:\n\nDo not click web links or open attachments in unsolicited email messages.\n\nRefer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.\n\nRefer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.\n\nNo known public exploitation specifically targeting these vulnerabilities has been reported to CISA at this time. These vulnerabilities are not exploitable remotely.\n\n\n\nRevision History\n\n\n\nInitial Release Date: 2026-05-12\n\n\n\n\n\nDate\nRevision\nSummary\n\n\n\n\n2026-05-12\n1\nInitial Publication\n\n\n\n\n\n\nLegal Notice and Terms of Use", "creation_timestamp": "2026-05-12T10:00:00.000000Z"}]}