CVE-2026-87665

MEDIUMPre-NVD 6.06.0—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.8% (56th percentile of EPSS-scored CVEs). 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
6.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 6.0Exploit: None knownExposed services: Not assessed

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

A stack-based buffer overflow vulnerability exists in the Internet Key Exchange (IKEv2) protocol handler on Brocade Fabric OS versions before 10.0.1. The vulnerability occurs when processing initial IKE key exchange requests on extension switches or blades running IPsec-enabled Fibre Channel over IP (FCIP) circuits. An unauthenticated remote attacker can exploit this vulnerability by sending a single, specifically crafted UDP packet (Port 500) containing an oversized Nonce payload. Successful exploitation results in a denial of service (data-plane process crash)

CVSS v3
6.0
EG Score
6.0MEDIUMmedium confidence
EG Risk
27
EG Risk 27/100CISA SSVC

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
Severity60% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.8%
EPSS %ILE
56th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

October 8, 2026

Last Modified

October 8, 2026

Advisory Details (1)

Auto-updated Oct 8, 2026
No fix on record yet.
generic

Support Content Notification - Support Portal - Broadcom support portal

https://support.broadcom.com/external/content/SecurityAdvisories/0/39148

Vendor Advisories for CVE-2026-87665(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 16× in last 7d / 16× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-10-10 22:15 UTCEG score recompute
  2. 2026-10-10 22:15 UTCGHSA enrichmentGHSA-v6r4-5332-gjp3
  3. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  4. 2026-10-09 21:16 UTCEG score recompute
  5. 2026-10-09 21:16 UTCGHSA enrichmentGHSA-v6r4-5332-gjp3
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  7. 2026-10-08 20:17 UTCEG score recompute
  8. 2026-10-08 20:17 UTCGHSA enrichmentGHSA-v6r4-5332-gjp3
  9. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  10. 2026-10-08 14:55 UTCEG score recompute
  11. 2026-10-08 14:55 UTCGHSA enrichmentGHSA-v6r4-5332-gjp3
  12. 2026-10-08 13:40 UTCEG score recompute
  13. 2026-10-08 13:40 UTCGHSA enrichmentGHSA-v6r4-5332-gjp3
  14. 2026-10-08 03:21 UTCEG score recompute
  15. 2026-10-08 03:06 UTCEG score recompute
  16. 2026-10-08 03:06 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-87665?
CVE-2026-87665 is a medium vulnerability published on October 8, 2026. A stack-based buffer overflow vulnerability exists in the Internet Key Exchange (IKEv2) protocol handler on Brocade Fabric OS versions before 10.0.1. The vulnerability occurs when processing initial IKE key exchange requests on extension switches or blades running IPsec-enabled Fibre Channel over…
When was the CVE record for CVE-2026-87665 published?
The CVE record for CVE-2026-87665 was published on October 8, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 8, 2026; the record at its source may have been updated since.
Is CVE-2026-87665 actively exploited?
CVE-2026-87665 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (56th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-87665?
CVE-2026-87665 has a CVSS base score of 6.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-87665?
No fix for CVE-2026-87665 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-87665 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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