CVE-2026-85421

Control-plane compromise via unauthenticated HTTPS control requests

Published Oct 8, 2026 · Updated Oct 8, 2026

Missing authentication in Brocade ASCG before 3.5.0 allows remote attackers to control streaming services via HTTPS requests. The ASCGStreaming Service in Brocade Active Support Connectivity Gateway accepts control commands without enforcing authentication or access checks. Standard deployments are affected; exploitation requires adjacent-network access and permits cluster-state and system-configuration changes.

CVSS severity8.7
High
EPSS probability0.22%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in Brocade ASCG before 3.5.0 allows remote attackers to control streaming services via HTTPS requests. The ASCGStreaming Service in Brocade Active Support Connectivity Gateway accepts control commands without enforcing authentication or access checks. Standard deployments are affected; exploitation requires adjacent-network access and permits cluster-state and system-configuration changes.

The record

CVE
CVE-2026-85421
Published
Oct 8, 2026
Updated
Oct 8, 2026
Vendor
Brocade Communications Systems
Product
Brocade Active Support Connectivity Gateway
Classifications
CWE-306, CAPEC-115, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.5.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Brocade Communications Systems · Brocade Active Support Connectivity Gatewayversion=0 <3.5.0

Published CVSS scores

8.7BrocadeCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
CAPEC-115Authentication Bypass
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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