CVE-2026-19313

CRITICALPre-NVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.3 under the CNA's CVSS (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: cna:watchguard, epss
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.

An heap 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 11, 2026

Advisory Details (1)

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

CVE-2026-19313 — Fireware OS Pre-Authentication Heap Buffer Overflow in iked Allows Remote Code Execution

https://psirt.watchguard.com/CVE-2026-19313

Vendor Advisories for CVE-2026-19313(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 56× in last 7d / 191× 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 191 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-19313?
CVE-2026-19313 is a critical vulnerability published on August 27, 2026. An heap 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-2026-19313 disclosed?
CVE-2026-19313 was first published in the National Vulnerability Database on August 27, 2026, with the most recent update on September 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-19313 actively exploited?
CVE-2026-19313 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-2026-19313?
CVE-2026-19313 has a CVSS v4.0 base score of 9.3 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-19313?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-19313, 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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