CVE-2026-19318

CRITICALPre-NVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 60% 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
9.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.3Exploit: 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 in the WatchGuard Fireware OS iked process allows a remote unauthenticated attacker to execute arbitrary code by sending specially crafted network traffic.

CVSS v3
9.3
EG Score
9.3(medium)
EG Risk
57(Track)
EG Risk 57/100SSVC: 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
Severity93% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
40%
KEV
Not listed

Published

August 27, 2026

Last Modified

September 3, 2026

Advisory Details (1)

Auto-updated Sep 14, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic🔴 Active Exploitation

CVE-2026-19318 — Fireware OS Pre-Authentication Stack Buffer Overflow in iked Allows Remote Code Execution

https://psirt.watchguard.com/CVE-2026-19318

Vendor Advisories for CVE-2026-19318(1)

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

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 50× in last 7d / 181× 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 181 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-19318?
CVE-2026-19318 is a critical vulnerability published on August 27, 2026. A stack-based buffer overflow vulnerability in the WatchGuard Fireware OS iked process allows a remote unauthenticated attacker to execute arbitrary code by sending specially crafted network traffic.
When was CVE-2026-19318 disclosed?
CVE-2026-19318 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-2026-19318 actively exploited?
CVE-2026-19318 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 60.1% of all scored CVEs.
What is the CVSS score of CVE-2026-19318?
CVE-2026-19318 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2026-19318?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-19318, 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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