CVE-2026-9509Network attack vector

Service outage via unauthenticated migration request

Published May 29, 2026 · Updated May 29, 2026

Uncaught exception in Suprema BioStar 2 Server 2.9.8, 2.9.10, and 2.9.11 allows remote attackers to interrupt service. The /api/migration handler fails to catch an exception raised by a crafted HTTP POST and halts critical BioStar processes. No authentication or user interaction is required; the server stays offline until manually restarted, stopping access-control readers and disrupting integrations.

CVSS severity8.7
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncaught exception in Suprema BioStar 2 Server 2.9.8, 2.9.10, and 2.9.11 allows remote attackers to interrupt service. The /api/migration handler fails to catch an exception raised by a crafted HTTP POST and halts critical BioStar processes. No authentication or user interaction is required; the server stays offline until manually restarted, stopping access-control readers and disrupting integrations.

The record

CVE
CVE-2026-9509
Published
May 29, 2026
Updated
May 29, 2026
Vendor
Suprema Inc.
Product
BioStar 2
Classifications
CWE-248, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 29, 2026CVE publishedPublication date reported by the CVE source.
  2. May 29, 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=v2.9.10
  2. Affected versionversion=v2.9.11
  3. Affected versionversion=v2.9.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Suprema Inc. · BioStar 2version=v2.9.10; version=v2.9.11; version=v2.9.8

Published CVSS scores

8.7INCIBE CNA recordCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-248Uncaught Exception
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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Your stack

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