CVE-2026-18796

MEDIUMPre-NVD 6.86.8—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.8 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 100% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: cna:yeswehack, epss
Trending — 3 sources updated this week
6.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.8Exploit: None knownExposed: 0

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

Any application that uses external QSPI flash for encrypted XIP on nRF5340 and relies on that encryption for confidentiality and/or integrity of the externally stored code. No specific nRF Connect SDK version is the root cause; the weakness is in the on-the-fly decryption scheme.

CVSS v3
6.8
EG Score
6.8(medium)
EG Risk
31(Track)
EG Risk 31/100SSVC: 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
Severity68% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
0%
KEV
Not listed

Published

September 7, 2026

Last Modified

September 10, 2026

References (1)

Vendor Advisories for CVE-2026-18796(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 / 31× 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. 2026-09-19 02:05 UTCGHSA enrichment
  2. 2026-09-18 00:21 UTCEG score recompute
  3. 2026-09-18 00:21 UTCGHSA enrichment
  4. 2026-09-16 22:36 UTCEG score recompute
  5. 2026-09-16 22:36 UTCGHSA enrichment
  6. 2026-09-16 14:07 UTCEPSS rescore
  7. 2026-09-16 05:14 UTCEPSS rescore
  8. 2026-09-15 20:51 UTCGHSA enrichment
  9. 2026-09-14 18:38 UTCGHSA enrichment
  10. 2026-09-13 16:47 UTCGHSA enrichment
  11. 2026-09-12 15:02 UTCEG score recompute
  12. 2026-09-12 15:02 UTCGHSA enrichment
  13. 2026-09-12 15:00 UTCEPSS rescore
  14. 2026-09-11 14:52 UTCEPSS rescore
  15. 2026-09-11 13:17 UTCGHSA enrichment
  16. 2026-09-10 11:32 UTCEG score recompute
  17. 2026-09-10 11:32 UTCGHSA enrichment
  18. 2026-09-10 09:34 UTCEPSS rescore
  19. 2026-09-09 16:03 UTCEG score recompute
  20. 2026-09-09 16:03 UTCGHSA enrichment
  21. 2026-09-08 22:00 UTCEPSS rescore
  22. 2026-09-08 16:02 UTCEG score recompute
  23. 2026-09-08 16:02 UTCGHSA enrichment
  24. 2026-09-08 15:07 UTCEG score recompute
  25. 2026-09-08 15:07 UTCGHSA enrichment
Show 6 more
  1. 2026-09-08 11:17 UTCEG score recompute
  2. 2026-09-08 11:16 UTCGHSA enrichment
  3. 2026-09-07 16:01 UTCEPSS rescore
  4. 2026-09-07 09:30 UTCEG score recompute
  5. 2026-09-07 08:38 UTCEG score recompute
  6. 2026-09-07 08:36 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-18796?
CVE-2026-18796 is a medium vulnerability published on September 7, 2026. Any application that uses external QSPI flash for encrypted XIP on nRF5340 and relies on that encryption for confidentiality and/or integrity of the externally stored code. No specific nRF Connect SDK version is the root cause; the weakness is in the on-the-fly decryption scheme.
When was CVE-2026-18796 disclosed?
CVE-2026-18796 was first published in the National Vulnerability Database on September 7, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18796 actively exploited?
CVE-2026-18796 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 99.8% of all scored CVEs.
What is the CVSS score of CVE-2026-18796?
CVE-2026-18796 has a CVSS v4.0 base score of 6.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-18796?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-18796, 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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