CVE-2026-67673

MEDIUMPre-NVD 4.64.6—
EchelonGraph scoreHIGH 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%CVSS: 4.6Exploit: None knownExposed: 0

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

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
4.6(high)
EG Risk
21(Track)
EG Risk 21/100SSVC: Track

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%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

August 3, 2026

Last Modified

August 5, 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 18× in last 7d / 50× 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. 2026-08-20 22:56 UTCEPSS rescore
  2. 2026-08-20 14:22 UTCEG score recompute
  3. 2026-08-20 14:22 UTCGHSA enrichment
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-19 13:04 UTCEG score recompute
  6. 2026-08-19 13:04 UTCGHSA enrichment
  7. 2026-08-18 13:48 UTCEPSS rescore
  8. 2026-08-18 11:47 UTCEG score recompute
  9. 2026-08-18 11:47 UTCGHSA enrichment
  10. 2026-08-17 13:47 UTCEPSS rescore
  11. 2026-08-17 10:30 UTCEG score recompute
  12. 2026-08-17 10:30 UTCGHSA enrichment
  13. 2026-08-16 14:56 UTCEPSS rescore
  14. 2026-08-16 09:14 UTCEG score recompute
  15. 2026-08-16 09:14 UTCGHSA enrichment
  16. 2026-08-15 07:59 UTCEG score recompute
  17. 2026-08-15 07:59 UTCGHSA enrichment
  18. 2026-08-15 01:30 UTCEPSS rescore
  19. 2026-08-14 06:42 UTCEG score recompute
  20. 2026-08-14 06:42 UTCGHSA enrichment
  21. 2026-08-13 22:00 UTCEPSS rescore
  22. 2026-08-13 05:26 UTCEG score recompute
  23. 2026-08-13 05:26 UTCGHSA enrichment
  24. 2026-08-12 13:51 UTCEPSS rescore
  25. 2026-08-12 04:10 UTCEG score recompute
Show 25 more
  1. 2026-08-12 04:10 UTCGHSA enrichment
  2. 2026-08-11 02:53 UTCEG score recompute
  3. 2026-08-11 02:53 UTCGHSA enrichment
  4. 2026-08-11 00:00 UTCEPSS rescore
  5. 2026-08-10 01:38 UTCEG score recompute
  6. 2026-08-10 01:38 UTCGHSA enrichment
  7. 2026-08-09 13:47 UTCEPSS rescore
  8. 2026-08-09 00:22 UTCEG score recompute
  9. 2026-08-09 00:22 UTCGHSA enrichment
  10. 2026-08-08 16:37 UTCEPSS rescore
  11. 2026-08-07 23:05 UTCEG score recompute
  12. 2026-08-07 23:05 UTCGHSA enrichment
  13. 2026-08-06 21:49 UTCEG score recompute
  14. 2026-08-06 21:49 UTCGHSA enrichment
  15. 2026-08-06 13:47 UTCEPSS rescore
  16. 2026-08-05 20:33 UTCGHSA enrichment
  17. 2026-08-05 19:40 UTCEG score recompute▲ 4.60
  18. 2026-08-05 19:40 UTCGHSA enrichment
  19. 2026-08-05 19:40 UTCMITRE cvelistV5CVSS v3 → 4.6 · severity → MEDIUM
  20. 2026-08-05 19:17 UTCEPSS rescore
  21. 2026-08-05 19:17 UTCEPSS rescore
  22. 2026-08-04 15:10 UTCEPSS rescore
  23. 2026-08-03 23:22 UTCNVD update
  24. 2026-08-03 22:28 UTCEG score recompute
  25. 2026-08-03 22:28 UTCMITRE cvelistV5first tracked

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 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-2026-67673 actively exploited?
CVE-2026-67673 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 95.1% of all 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?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67673, 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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