CVE-2026-67973

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-04. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

An issue in the CFDP receive path of NASA cFS v7.0.1 allows attackers to cause a Denial of Service (DoS) via replaying final CFDP PDUs.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

August 3, 2026

Last Modified

August 5, 2026

Advisory Details (2)

Auto-updated Aug 5, 2026
No patch confirmed yet.
generic

[SECURITY] CFDP finished transactions remain re-matchable in holdover allowing resource exhaustion via replayed EOF · Issue #1075 · nasa/cFS · GitHub

https://github.com/nasa/cFS/issues/1075
generic

GitHub - nasa/cFS: The Core Flight System (cFS) · GitHub

https://github.com/nasa/cFS

Vendor Advisories for CVE-2026-67973(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 26× in last 7d / 68× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-21 00:25 UTCEG score recompute
  2. 2026-08-21 00:25 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 11:47 UTCGHSA enrichment
  5. 2026-08-19 23:07 UTCEG score recompute
  6. 2026-08-19 23:07 UTCGHSA enrichment
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 10:25 UTCGHSA enrichment
  9. 2026-08-18 21:44 UTCEG score recompute
  10. 2026-08-18 21:44 UTCGHSA enrichment
  11. 2026-08-18 13:48 UTCEPSS rescore
  12. 2026-08-18 08:41 UTCGHSA enrichment
  13. 2026-08-17 19:38 UTCEG score recompute
  14. 2026-08-17 19:38 UTCGHSA enrichment
  15. 2026-08-17 13:47 UTCEPSS rescore
  16. 2026-08-17 06:50 UTCGHSA enrichment
  17. 2026-08-16 18:12 UTCEG score recompute
  18. 2026-08-16 18:12 UTCGHSA enrichment
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-16 05:33 UTCEG score recompute
  21. 2026-08-16 05:33 UTCGHSA enrichment
  22. 2026-08-15 16:54 UTCGHSA enrichment
  23. 2026-08-15 04:15 UTCEG score recompute
  24. 2026-08-15 04:15 UTCGHSA enrichment
  25. 2026-08-15 01:30 UTCEPSS rescore
Show 43 more
  1. 2026-08-14 15:36 UTCGHSA enrichment
  2. 2026-08-14 02:58 UTCEG score recompute
  3. 2026-08-14 02:58 UTCGHSA enrichment
  4. 2026-08-13 22:00 UTCEPSS rescore
  5. 2026-08-13 14:19 UTCGHSA enrichment
  6. 2026-08-13 01:41 UTCEG score recompute
  7. 2026-08-13 01:41 UTCGHSA enrichment
  8. 2026-08-12 13:51 UTCEPSS rescore
  9. 2026-08-12 13:02 UTCGHSA enrichment
  10. 2026-08-12 00:22 UTCEG score recompute
  11. 2026-08-12 00:22 UTCGHSA enrichment
  12. 2026-08-11 11:40 UTCEG score recompute
  13. 2026-08-11 11:40 UTCGHSA enrichment
  14. 2026-08-11 00:00 UTCEPSS rescore
  15. 2026-08-10 23:01 UTCGHSA enrichment
  16. 2026-08-10 10:22 UTCGHSA enrichment
  17. 2026-08-09 21:43 UTCEG score recompute
  18. 2026-08-09 21:43 UTCGHSA enrichment
  19. 2026-08-09 13:47 UTCEPSS rescore
  20. 2026-08-09 09:05 UTCGHSA enrichment
  21. 2026-08-08 20:26 UTCEG score recompute
  22. 2026-08-08 20:26 UTCGHSA enrichment
  23. 2026-08-08 16:37 UTCEPSS rescore
  24. 2026-08-08 07:47 UTCGHSA enrichment
  25. 2026-08-07 19:09 UTCEG score recompute
  26. 2026-08-07 19:09 UTCGHSA enrichment
  27. 2026-08-07 06:30 UTCGHSA enrichment
  28. 2026-08-06 17:51 UTCEG score recompute
  29. 2026-08-06 17:51 UTCGHSA enrichment
  30. 2026-08-06 13:47 UTCEPSS rescore
  31. 2026-08-06 05:11 UTCEG score recompute
  32. 2026-08-06 05:11 UTCGHSA enrichment
  33. 2026-08-05 19:17 UTCEPSS rescore
  34. 2026-08-05 19:17 UTCEPSS rescore
  35. 2026-08-05 16:32 UTCEG score recompute
  36. 2026-08-05 16:32 UTCGHSA enrichment
  37. 2026-08-05 15:26 UTCEG score recompute▲ 7.50
  38. 2026-08-05 15:26 UTCGHSA enrichment
  39. 2026-08-05 15:25 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  40. 2026-08-04 15:10 UTCEPSS rescore
  41. 2026-08-03 22:21 UTCNVD update
  42. 2026-08-03 22:03 UTCEG score recompute
  43. 2026-08-03 22:03 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-67973?
CVE-2026-67973 is a high vulnerability published on August 3, 2026. An issue in the CFDP receive path of NASA cFS v7.0.1 allows attackers to cause a Denial of Service (DoS) via replaying final CFDP PDUs.
When was CVE-2026-67973 disclosed?
CVE-2026-67973 was first published in the National Vulnerability Database on August 3, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67973 actively exploited?
CVE-2026-67973 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 79.6% of all scored CVEs.
What is the CVSS score of CVE-2026-67973?
CVE-2026-67973 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-67973?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67973, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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