CVE-2026-67673

MEDIUMPre-NVD 4.64.6—
EchelonGraph scoreMEDIUM confidence

Score 4.6 from GitHub Security Advisory published 2026-08-04. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 4.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
4.6EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 4.6Exploit: None knownExposed services: Not assessed

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

A stack-based buffer overflow vulnerability exists in the cmd_edl function of OreSat Firmware v1.0. The vulnerability is triggered when processing the edl fw_flash command, where the argument is copied to a 64-byte stack buffer via memcpy without proper length validation. An attacker with physical access to the UART3 serial interface can exploit this vulnerability by sending a maliciously crafted command with an oversized filename parameter,

CVSS v3
4.6
EG Score
4.6MEDIUMmedium confidence
EG Risk
21
EG Risk 21/100CISA SSVC

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
Severity46% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.2%
EPSS %ILE
10th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 3, 2026

Last Modified

September 9, 2026

Advisory Details (1)

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

OreSat C3 Firmware: Stack Buffer Overflow in cmd_edl · Issue #2 · dazuo233/cve · GitHub

https://github.com/dazuo233/cve/issues/2

Vendor Advisories for CVE-2026-67673(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 13× in last 7d / 62× 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.

Showing the most recent 100 of 148 total refreshes for this CVE.

  1. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-04 06:23 UTCEG score recompute
  3. 2026-10-04 06:23 UTCGHSA enrichment
  4. 2026-10-03 14:26 UTCEPSS rescore
  5. 2026-10-02 17:56 UTCEPSS rescore
  6. 2026-10-02 10:26 UTCEG score recompute
  7. 2026-10-02 10:26 UTCGHSA enrichment
  8. 2026-10-01 19:50 UTCEPSS rescore
  9. 2026-10-01 02:40 UTCEG score recompute
  10. 2026-10-01 02:40 UTCGHSA enrichment
  11. 2026-09-30 15:03 UTCEPSS rescore
  12. 2026-09-29 06:45 UTCEG score recompute
  13. 2026-09-29 06:45 UTCGHSA enrichment
  14. 2026-09-28 13:52 UTCEPSS rescore
  15. 2026-09-27 18:20 UTCEG score recompute
  16. 2026-09-27 18:20 UTCGHSA enrichment
  17. 2026-09-27 13:48 UTCEPSS rescore
  18. 2026-09-26 15:59 UTCEPSS rescore
  19. 2026-09-24 09:21 UTCEG score recompute
  20. 2026-09-24 09:21 UTCGHSA enrichment
  21. 2026-09-23 17:54 UTCEPSS rescore
  22. 2026-09-23 08:05 UTCEG score recompute
  23. 2026-09-23 08:05 UTCGHSA enrichment
  24. 2026-09-22 06:49 UTCEG score recompute
  25. 2026-09-22 06:49 UTCGHSA enrichment
Show 75 more
  1. 2026-09-20 20:58 UTCEG score recompute
  2. 2026-09-20 20:58 UTCGHSA enrichment
  3. 2026-09-20 20:16 UTCEPSS rescore
  4. 2026-09-19 13:38 UTCEG score recompute
  5. 2026-09-19 13:38 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 08:38 UTCEG score recompute
  8. 2026-09-18 08:38 UTCGHSA enrichment
  9. 2026-09-17 07:02 UTCEG score recompute
  10. 2026-09-17 07:02 UTCGHSA enrichment
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 05:21 UTCEG score recompute
  13. 2026-09-16 05:21 UTCGHSA enrichment
  14. 2026-09-16 05:15 UTCEPSS rescore
  15. 2026-09-15 02:47 UTCGHSA enrichment
  16. 2026-09-13 22:56 UTCEG score recompute
  17. 2026-09-13 22:56 UTCGHSA enrichment
  18. 2026-09-12 21:40 UTCGHSA enrichment
  19. 2026-09-11 20:24 UTCEG score recompute
  20. 2026-09-11 20:24 UTCGHSA enrichment
  21. 2026-09-11 14:53 UTCEPSS rescore
  22. 2026-09-11 09:37 UTCEPSS rescore
  23. 2026-09-10 18:46 UTCEG score recompute
  24. 2026-09-10 18:46 UTCGHSA enrichment
  25. 2026-09-09 16:18 UTCGHSA enrichment
  26. 2026-09-09 06:53 UTCEG score recompute
  27. 2026-09-09 06:53 UTCGHSA enrichment
  28. 2026-09-08 22:01 UTCEPSS rescore
  29. 2026-09-07 22:00 UTCEG score recompute
  30. 2026-09-07 22:00 UTCGHSA enrichment
  31. 2026-09-07 16:01 UTCEPSS rescore
  32. 2026-09-06 20:44 UTCEG score recompute
  33. 2026-09-06 20:44 UTCGHSA enrichment
  34. 2026-09-06 13:47 UTCEPSS rescore
  35. 2026-09-05 18:42 UTCEG score recompute
  36. 2026-09-05 18:42 UTCGHSA enrichment
  37. 2026-09-05 15:31 UTCEPSS rescore
  38. 2026-09-04 10:30 UTCEG score recompute
  39. 2026-09-04 10:30 UTCGHSA enrichment
  40. 2026-09-04 05:07 UTCEPSS rescore
  41. 2026-09-03 09:13 UTCEG score recompute
  42. 2026-09-03 09:13 UTCGHSA enrichment
  43. 2026-09-02 14:12 UTCEPSS rescore
  44. 2026-09-02 07:57 UTCEG score recompute
  45. 2026-09-02 07:57 UTCGHSA enrichment
  46. 2026-09-01 13:54 UTCEPSS rescore
  47. 2026-09-01 04:40 UTCEPSS rescore
  48. 2026-09-01 00:42 UTCGHSA enrichment
  49. 2026-08-30 23:26 UTCEG score recompute
  50. 2026-08-30 23:26 UTCGHSA enrichment
  51. 2026-08-30 19:17 UTCEPSS rescore
  52. 2026-08-30 01:22 UTCEPSS rescore
  53. 2026-08-29 22:10 UTCEG score recompute
  54. 2026-08-29 22:10 UTCGHSA enrichment
  55. 2026-08-28 21:42 UTCEPSS rescore
  56. 2026-08-27 23:17 UTCEG score recompute
  57. 2026-08-27 23:17 UTCGHSA enrichment
  58. 2026-08-26 22:01 UTCEG score recompute
  59. 2026-08-26 22:01 UTCGHSA enrichment
  60. 2026-08-26 14:47 UTCEPSS rescore
  61. 2026-08-25 20:45 UTCEG score recompute
  62. 2026-08-25 20:45 UTCGHSA enrichment
  63. 2026-08-25 13:49 UTCEPSS rescore
  64. 2026-08-24 19:29 UTCEG score recompute
  65. 2026-08-24 19:29 UTCGHSA enrichment
  66. 2026-08-23 18:12 UTCEG score recompute
  67. 2026-08-23 18:12 UTCGHSA enrichment
  68. 2026-08-23 00:19 UTCEPSS rescore
  69. 2026-08-22 16:56 UTCEG score recompute
  70. 2026-08-22 16:56 UTCGHSA enrichment
  71. 2026-08-21 23:49 UTCEPSS rescore
  72. 2026-08-21 15:39 UTCEG score recompute
  73. 2026-08-21 15:39 UTCGHSA enrichment
  74. 2026-08-20 22:56 UTCEPSS rescore
  75. 2026-08-20 14:22 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-67673?
CVE-2026-67673 is a medium vulnerability published on August 3, 2026. A stack-based buffer overflow vulnerability exists in the cmdedl function of OreSat Firmware v1.0. The vulnerability is triggered when processing the edl fwflash command, where the <filename> argument is copied to a 64-byte stack buffer via memcpy without proper length validation. An attacker with…
When was CVE-2026-67673 disclosed?
CVE-2026-67673 was first published on August 3, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67673 actively exploited?
CVE-2026-67673 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (10th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-67673?
CVE-2026-67673 has a CVSS v3.1 base score of 4.6 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-67673?
No fix for CVE-2026-67673 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-67673 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-67673

Explore →

Is Your Infrastructure Affected by CVE-2026-67673?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs