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 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.

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
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-2026-19318 — 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 24× in last 7d / 24× 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 05:23 UTCGHSA enrichment
  2. 2026-08-30 01:22 UTCEG score recompute
  3. 2026-08-30 01:22 UTCGHSA enrichment
  4. 2026-08-30 01:22 UTCEPSS rescore
  5. 2026-08-29 21:20 UTCGHSA enrichment
  6. 2026-08-29 17:19 UTCGHSA enrichment
  7. 2026-08-29 12:33 UTCGHSA enrichment
  8. 2026-08-29 08:30 UTCGHSA enrichment
  9. 2026-08-29 04:27 UTCEG score recompute
  10. 2026-08-29 04:27 UTCGHSA enrichment
  11. 2026-08-29 04:06 UTCEG score recompute
  12. 2026-08-29 04:05 UTCGHSA enrichment
  13. 2026-08-29 00:27 UTCEG score recompute
  14. 2026-08-29 00:27 UTCGHSA enrichment
  15. 2026-08-28 21:41 UTCEPSS rescore
  16. 2026-08-28 20:24 UTCGHSA enrichment
  17. 2026-08-28 18:59 UTCGHSA enrichment
  18. 2026-08-28 18:33 UTCGHSA enrichment
  19. 2026-08-28 14:27 UTCGHSA enrichment
  20. 2026-08-28 10:24 UTCGHSA enrichment
  21. 2026-08-28 06:21 UTCGHSA enrichment
  22. 2026-08-28 02:18 UTCEG score recompute
  23. 2026-08-28 02:12 UTCEG score recompute
  24. 2026-08-28 02:07 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

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 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-2026-19318 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 61.2% 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

Explore the affected products and dependency analysis for CVE-2026-19318

Explore →

Is Your Infrastructure Affected by CVE-2026-19318?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs