CVE-2026-19317

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 75% 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: epss, secondary
Trending — 3 sources updated this week
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.7Exploit: None knownExposed: 0

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

An out-of-bounds read vulnerability in the WatchGuard Fireware OS iked process allows a remote unauthenticated attacker to create a Denial of Service (DoS) condition in VPN processing by sending specially crafted network traffic.

CVSS v3
8.7
EG Score
8.7(medium)
EG Risk
54(Track)
EG Risk 54/100SSVC: 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
Severity87% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

August 27, 2026

Last Modified

September 3, 2026

Advisory Details (1)

Auto-updated Aug 28, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic🔴 Active Exploitation

CVE-2026-19317 — Fireware OS Pre-Authentication Out-of-Bounds Read in iked Allows Denial of Service (DoS)

https://psirt.watchguard.com/CVE-2026-19317

Vendor Advisories for CVE-2026-19317(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 23× in last 7d / 85× 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 12:02 UTCGHSA enrichment
  2. 2026-09-18 22:58 UTCEG score recompute
  3. 2026-09-18 22:58 UTCGHSA enrichment
  4. 2026-09-18 19:27 UTCEPSS rescore
  5. 2026-09-18 09:56 UTCGHSA enrichment
  6. 2026-09-17 20:53 UTCEG score recompute
  7. 2026-09-17 20:53 UTCGHSA enrichment
  8. 2026-09-17 04:42 UTCGHSA enrichment
  9. 2026-09-16 15:39 UTCEG score recompute
  10. 2026-09-16 15:39 UTCGHSA enrichment
  11. 2026-09-16 14:07 UTCEPSS rescore
  12. 2026-09-16 05:14 UTCEPSS rescore
  13. 2026-09-16 02:20 UTCGHSA enrichment
  14. 2026-09-15 13:17 UTCEG score recompute
  15. 2026-09-15 13:17 UTCGHSA enrichment
  16. 2026-09-15 00:14 UTCGHSA enrichment
  17. 2026-09-14 11:11 UTCGHSA enrichment
  18. 2026-09-13 22:09 UTCEG score recompute
  19. 2026-09-13 22:09 UTCGHSA enrichment
  20. 2026-09-13 16:46 UTCEPSS rescore
  21. 2026-09-13 09:06 UTCGHSA enrichment
  22. 2026-09-12 20:04 UTCEG score recompute
  23. 2026-09-12 20:04 UTCGHSA enrichment
  24. 2026-09-12 15:00 UTCEPSS rescore
  25. 2026-09-12 07:02 UTCGHSA enrichment
Show 60 more
  1. 2026-09-11 18:00 UTCEG score recompute
  2. 2026-09-11 18:00 UTCGHSA enrichment
  3. 2026-09-11 14:52 UTCEPSS rescore
  4. 2026-09-11 09:36 UTCEPSS rescore
  5. 2026-09-11 04:57 UTCGHSA enrichment
  6. 2026-09-10 15:54 UTCEG score recompute
  7. 2026-09-10 15:54 UTCGHSA enrichment
  8. 2026-09-10 09:34 UTCEPSS rescore
  9. 2026-09-10 02:51 UTCGHSA enrichment
  10. 2026-09-09 13:49 UTCGHSA enrichment
  11. 2026-09-09 00:36 UTCEG score recompute
  12. 2026-09-09 00:36 UTCGHSA enrichment
  13. 2026-09-08 22:00 UTCEPSS rescore
  14. 2026-09-08 05:54 UTCGHSA enrichment
  15. 2026-09-07 16:46 UTCEG score recompute
  16. 2026-09-07 16:46 UTCGHSA enrichment
  17. 2026-09-07 16:01 UTCEPSS rescore
  18. 2026-09-07 03:43 UTCGHSA enrichment
  19. 2026-09-06 14:39 UTCEG score recompute
  20. 2026-09-06 14:39 UTCGHSA enrichment
  21. 2026-09-06 13:47 UTCEPSS rescore
  22. 2026-09-06 01:36 UTCEG score recompute
  23. 2026-09-06 01:36 UTCGHSA enrichment
  24. 2026-09-05 12:34 UTCGHSA enrichment
  25. 2026-09-04 23:32 UTCEG score recompute
  26. 2026-09-04 23:32 UTCGHSA enrichment
  27. 2026-09-04 10:24 UTCEG score recompute
  28. 2026-09-04 10:24 UTCGHSA enrichment
  29. 2026-09-04 05:06 UTCEPSS rescore
  30. 2026-09-03 21:21 UTCEG score recompute
  31. 2026-09-03 21:21 UTCGHSA enrichment
  32. 2026-09-03 20:55 UTCEG score recompute
  33. 2026-09-03 20:55 UTCGHSA enrichment
  34. 2026-09-03 09:31 UTCGHSA enrichment
  35. 2026-09-02 20:27 UTCEG score recompute
  36. 2026-09-02 20:27 UTCGHSA enrichment
  37. 2026-09-02 14:11 UTCEPSS rescore
  38. 2026-09-02 05:14 UTCGHSA enrichment
  39. 2026-09-01 16:11 UTCEG score recompute
  40. 2026-09-01 16:11 UTCGHSA enrichment
  41. 2026-09-01 13:53 UTCEPSS rescore
  42. 2026-09-01 04:39 UTCEPSS rescore
  43. 2026-09-01 02:47 UTCGHSA enrichment
  44. 2026-08-31 13:44 UTCGHSA enrichment
  45. 2026-08-31 00:39 UTCEG score recompute
  46. 2026-08-31 00:39 UTCGHSA enrichment
  47. 2026-08-30 19:17 UTCEPSS rescore
  48. 2026-08-30 11:36 UTCEG score recompute
  49. 2026-08-30 11:36 UTCGHSA enrichment
  50. 2026-08-30 01:22 UTCEPSS rescore
  51. 2026-08-29 22:32 UTCGHSA enrichment
  52. 2026-08-29 09:29 UTCEG score recompute
  53. 2026-08-29 09:29 UTCGHSA enrichment
  54. 2026-08-28 21:41 UTCEPSS rescore
  55. 2026-08-28 20:24 UTCGHSA enrichment
  56. 2026-08-28 18:59 UTCGHSA enrichment
  57. 2026-08-28 15:23 UTCGHSA enrichment
  58. 2026-08-28 02:18 UTCEG score recompute
  59. 2026-08-28 02:11 UTCEG score recompute
  60. 2026-08-28 02:07 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-19317?
CVE-2026-19317 is a high vulnerability published on August 27, 2026. An out-of-bounds read vulnerability in the WatchGuard Fireware OS iked process allows a remote unauthenticated attacker to create a Denial of Service (DoS) condition in VPN processing by sending specially crafted network traffic.
When was CVE-2026-19317 disclosed?
CVE-2026-19317 was first published in the National Vulnerability Database on August 27, 2026, with the most recent update on September 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-19317 actively exploited?
CVE-2026-19317 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 74.6% of all scored CVEs.
What is the CVSS score of CVE-2026-19317?
CVE-2026-19317 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-19317?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-19317, 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

Explore the affected products and dependency analysis for CVE-2026-19317

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