CVE-2026-19313

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 61% 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 — 4 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
39%
KEV
Not listed

Published

August 27, 2026

Last Modified

August 29, 2026

Advisory Details (1)

Auto-updated Aug 29, 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 26× in last 7d / 26× 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. 2026-08-30 06:33 UTCGHSA enrichment
  2. 2026-08-30 02:50 UTCEG score recompute
  3. 2026-08-30 02:50 UTCGHSA enrichment
  4. 2026-08-30 01:22 UTCEPSS rescore
  5. 2026-08-29 23:07 UTCGHSA enrichment
  6. 2026-08-29 19:24 UTCGHSA enrichment
  7. 2026-08-29 15:41 UTCGHSA enrichment
  8. 2026-08-29 11:56 UTCGHSA enrichment
  9. 2026-08-29 08:10 UTCGHSA enrichment
  10. 2026-08-29 04:27 UTCEG score recompute
  11. 2026-08-29 04:27 UTCGHSA enrichment
  12. 2026-08-29 04:06 UTCEG score recompute
  13. 2026-08-29 04:05 UTCGHSA enrichment
  14. 2026-08-29 03:55 UTCGHSA enrichment
  15. 2026-08-29 00:09 UTCEG score recompute
  16. 2026-08-29 00:08 UTCGHSA enrichment
  17. 2026-08-28 21:41 UTCEPSS rescore
  18. 2026-08-28 20:24 UTCGHSA enrichment
  19. 2026-08-28 18:59 UTCGHSA enrichment
  20. 2026-08-28 17:20 UTCGHSA enrichment
  21. 2026-08-28 13:32 UTCGHSA enrichment
  22. 2026-08-28 09:46 UTCGHSA enrichment
  23. 2026-08-28 06:00 UTCGHSA enrichment
  24. 2026-08-28 02:18 UTCEG score recompute
  25. 2026-08-28 02:11 UTCEG score recompute
Show 1 more
  1. 2026-08-28 02:07 UTCMITRE cvelistV5first tracked

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 August 29, 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 61.2% of all scored CVEs.
What is the CVSS score of CVE-2026-19313?
CVE-2026-19313 has a CVSS v3 base score of 9.3 (NVD).
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

Explore the affected products and dependency analysis for CVE-2026-19313

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