NASA Core Flight System (cFS) Health & Safety (HS) Application

Summary

A NULL pointer dereference vulnerability, CVE-2026-18064, has been identified in NASA's Core Flight System (cFS) Health & Safety (HS) Application, affecting versions up to 7.0.1. Successful exploitation could lead to a denial-of-service condition and processor reset. A fix is under development, with an interim mitigation available on the dev branch of the HS GitHub repository.

Full text

ICS Advisory NASA Core Flight System (cFS) Health & Safety (HS) Application Release DateJuly 30, 2026 Alert CodeICSA-26-211-06 Related topics: Industrial Control System Vulnerabilities , Industrial Control Systems View CSAF Summary Successful exploitation of this vulnerability could allow an attacker to cause a denial-of-service condition. The following versions of NASA Core Flight System (cFS) Health & Safety (HS) Application are affected: Core Flight System (cFS) Health & Safety (HS) Application <=v7.0.1 (CVE-2026-18064) CVSS Vendor Equipment Vulnerabilities v3 7.5 NASA NASA Core Flight System (cFS) Health & Safety (HS) Application NULL Pointer Dereference Background Critical Infrastructure Sectors: Transportation Systems Countries/Areas Deployed: Worldwide Company Headquarters Location: United States Vulnerabilities Expand All + CVE-2026-18064 An incomplete fix for CVE-2026-15352 in the NASA core Flight System (cFS) Health and Safety (HS) application leaves a separate NULL pointer dereference reachable in versions through 7.0.1. An attacker who can trigger the affected command under specific conditions could cause the HS application to crash, resulting in a denial-of-service condition and processor reset. View CVE Details Affected Products NASA Core Flight System (cFS) Health & Safety (HS) Application Vendor:NASA Product Version:NASA Core Flight System (cFS) Health & Safety (HS) Application: <=v7.0.1 Product Status:known_affected Remediations MitigationNASA reports that an official fix is currently under development and is expected to be included in a future software release. MitigationAs an interim mitigation, users can update their HS app from the HS repo (https://github.com/nasa/HS) to the latest dev branch. The fix is in the dev branch starting at commit 828855f971db4b6714367ed0a970f52dbeab2965https://github.com/nasa/HS Relevant CWE: CWE-476 NULL Pointer Dereference Metrics CVSS Version Base Score Base Severity Vector String 3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 4.0 8.2 HIGH CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N Acknowledgments Michael Holmquist of Hasp Labs reported this vulnerability to CISA 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). Recommended Practices CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Minimize network exposure for all control system devices and/or systems, ensuring they are not accessible from the internet. Locate control system networks and remote devices behind firewalls and isolating them from business networks. When 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. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. 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. CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets. 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. Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents. 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. No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. Revision History Initial Release Date: 2026-07-30 Date Revision Summary 2026-07-30 1 Initial Publication Legal Notice and Terms of Use This product is provided subject to this Notification and this Privacy & Use policy. Tags Sector: Transportation Systems Sector Topics: Industrial Control System Vulnerabilities, Industrial Control Systems Please share your thoughts We recently updated our anonymous product survey; we welcome your feedback. Related Advisories Jul 30, 2026 ICS Advisory | ICSA-26-211-04 Schneider Electric IGSS Jul 30, 2026 ICS Advisory | ICSA-26-211-02 Johnson Controls OpenBlue Employee Jul 30, 2026 ICS Advisory | ICSA-26-211-01 MikroTik RouterOS Jul 30, 2026 ICS Advisory | ICSA-26-211-03 Toptech Systems RCU II+ and Multiload II+

Indicators of Compromise

• cve — CVE-2026-18064
• cve — CVE-2026-15352
• url — https://github.com/nasa/HS

Entities