EUVD-2026-18807
GHSA-43rr-mfcw-532v
Severity by source
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionCVE.org
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.
AnalysisAI
Heap-based buffer overflow in NASA cFS up to version 7.0.0 exists in the CFE_MSG_GetSize function within the CCSDS Packet Header Handler component (apps/to_lab/fsw/src/to_lab_passthru_encode.c), allowing attackers on the local network to cause memory corruption with limited confidentiality, integrity, and availability impact. The vulnerability requires network adjacency but no authentication or user interaction; no public exploit code has been identified, and the project has not yet released a patch despite early notification through GitHub issue tracking.
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Vulnerability AssessmentAI
| Risk Assessment | CVSS 5.3 indicates moderate severity with limited impact scope: the attack requires adjacency (AV:A), is relatively straightforward (AC:L), and results only in low confidentiality, integrity, and availability impact (VC:L/VI:L/VA:L). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with access to the local network where a cFS instance is operating (e.g., a compromised ground station, test facility, or network-adjacent system) crafts a malformed CCSDS telemetry packet with a manipulated size field that causes the CFE_MSG_GetSize function to miscalculate buffer boundaries. When the to_lab passthrough encoder processes this packet, it writes beyond the allocated heap buffer, corrupting adjacent memory structures. … |
| Remediation | Upgrade NASA cFS to a patched version beyond 7.0.0 once available from the project. … Detailed patch versions, workarounds, and compensating controls in full report. |
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