CVE-2026-93306Network attack vector

ASMI service interruption via malformed HTTPS request

Published Sep 25, 2026 · Updated Sep 25, 2026

Request-processing flaw in IBM Server Firmware ASMI allows remote attackers to crash the web server with a malformed HTTPS request. The ASMI web server does not safely reject malformed HTTPS input, causing a crash with possible memory corruption and creation of an error log. Unauthenticated access to the management network is required; ASMI restarts automatically, but repeated requests can sustain loss of the management interface.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Request-processing flaw in IBM Server Firmware ASMI allows remote attackers to crash the web server with a malformed HTTPS request. The ASMI web server does not safely reject malformed HTTPS input, causing a crash with possible memory corruption and creation of an error log. Unauthenticated access to the management network is required; ASMI restarts automatically, but repeated requests can sustain loss of the management interface.

The record

CVE
CVE-2026-93306
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

No CVSS assessment is available in this record.

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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