How severe is CVE-2026-5474?

CVE-2026-5474 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-5474 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-5474?

CVE-2026-5474 affects Nasa Core Flight System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-5474?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-5474 have an EU (EUVD) identifier?

Yes. CVE-2026-5474 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18807.

When was CVE-2026-5474 published?

CVE-2026-5474 was published on 2026-04-03 and last updated on 2026-06-17.

CVE-2026-5474

CVE-2026-5474 is a medium-severity vulnerability in Nasa Core Flight System with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
CVSS v2: 5.8
CVSS v4: 5.3
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-18807
Weakness: CWE-119
Affected product: Nasa Core Flight System
Published: 2026-04-03
Last modified: 2026-06-17

Description

A vulnerability was found in NASA cFS up to 7.0.0. This affects the function CFE_MSG_GetSize of the file apps/to_lab/fsw/src/to_lab_passthru_encode.c of the component CCSDS Packet Header Handler. Performing a manipulation results in heap-based buffer overflow. The attacker must have access to the local network to execute the attack. The project was informed of the problem early through an issue report but has not responded yet.

Frequently asked questions

What is CVE-2026-5474?: A vulnerability was found in NASA cFS up to 7.0.0. This affects the function CFE_MSG_GetSize of the file apps/to_lab/fsw/src/to_lab_passthru_encode.c of the component CCSDS Packet Header Handler. Performing a manipulation results in heap-based buffer overflow. The attacker must have access to the local network to execute the attack. The project was informed of the problem early through an issue report but has not responded yet.
How severe is CVE-2026-5474?: CVE-2026-5474 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-5474 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-5474?: CVE-2026-5474 affects Nasa Core Flight System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-5474?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-5474 have an EU (EUVD) identifier?: Yes. CVE-2026-5474 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18807.
When was CVE-2026-5474 published?: CVE-2026-5474 was published on 2026-04-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nasa:core_flight_system:*:*:*:*:*:*:*:*

More vulnerabilities in Nasa Core Flight System

CVE-2025-25373 — Critical (CVSS 9.8): The Memory Management Module of NASA cFS (Core Flight System) Aquila has insecure permissions, which can be exploited…
CVE-2025-25374 — High (CVSS 7.5): In NASA cFS (Core Flight System) Aquila, it is possible to put the onboard software in a state that will prevent the…
CVE-2025-25372 — High (CVSS 7.5): NASA cFS (Core Flight System) Aquila is vulnerable to segmentation fault via sending a malicious telecommand to the…
CVE-2025-25371 — High (CVSS 7.5): NASA cFS (Core Flight System) Aquila is vulnerable to path traversal in the OSAL module, allowing the override of any…
CVE-2026-5475 — Medium (CVSS 5.5): A vulnerability was determined in NASA cFS up to 7.0.0. This impacts the function CFE_SB_TransmitMsg of the file…
CVE-2026-5476 — Medium (CVSS 4.6): A vulnerability was identified in NASA cFS up to 7.0.0 on 32-bit. Affected is the function…

All CVEs affecting Nasa Core Flight System →

Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities

CVE-2026-2778 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability was fixed in…
CVE-2026-2776 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability…
CVE-2025-1866 — Critical (CVSS 10.0): Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in warmcat libwebsockets allows…
CVE-2022-27625 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2022-27624 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2020-11896 — Critical (CVSS 10.0): The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.

Browse all CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities →