How severe is CVE-2026-5475?

CVE-2026-5475 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2026-5475 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-5475?

CVE-2026-5475 affects Nasa Core Flight System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-5475?

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

Does CVE-2026-5475 have an EU (EUVD) identifier?

Yes. CVE-2026-5475 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18813.

When was CVE-2026-5475 published?

CVE-2026-5475 was published on 2026-04-03 and last updated on 2026-07-24.

CVE-2026-5475

CVE-2026-5475 is a medium-severity vulnerability in Nasa Core Flight System with a CVSS 3.x base score of 5.5. 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 5.5)
CVSS v2: 5.2
CVSS v4: 5.1
EPSS exploit prediction: 0% (26th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-18813
Weakness: CWE-119
Affected product: Nasa Core Flight System
Published: 2026-04-03
Last modified: 2026-07-24

Description

A vulnerability was determined in NASA cFS up to 7.0.0. This impacts the function CFE_SB_TransmitMsg of the file cfe_sb_priv.c of the component CCSDS Header Size Handler. Executing a manipulation can lead to memory corruption. The project was informed of the problem early through an issue report but has not responded yet.

Frequently asked questions

What is CVE-2026-5475?: A vulnerability was determined in NASA cFS up to 7.0.0. This impacts the function CFE_SB_TransmitMsg of the file cfe_sb_priv.c of the component CCSDS Header Size Handler. Executing a manipulation can lead to memory corruption. The project was informed of the problem early through an issue report but has not responded yet.
How severe is CVE-2026-5475?: CVE-2026-5475 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2026-5475 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-5475?: CVE-2026-5475 affects Nasa Core Flight System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-5475?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-5475 have an EU (EUVD) identifier?: Yes. CVE-2026-5475 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18813.
When was CVE-2026-5475 published?: CVE-2026-5475 was published on 2026-04-03 and last updated on 2026-07-24.

References

Affected products (1)

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

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