CVE-2026-19543

Service interruption via server-side validation bypass

Published Sep 14, 2026 · Updated Sep 14, 2026

Improper input validation in IBM Common Licensing Agent and ART 9.0 through 9.0.0.2 allows local users to interrupt service. The server trusts client-side validation and accepts modified request values without enforcing the same restrictions. No privileges or user interaction are required, but local access is required; IBM reports only availability impact and identifies no narrower request handler.

CVSS severity6.2
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in IBM Common Licensing Agent and ART 9.0 through 9.0.0.2 allows local users to interrupt service. The server trusts client-side validation and accepts modified request values without enforcing the same restrictions. No privileges or user interaction are required, but local access is required; IBM reports only availability impact and identifies no narrower request handler.

The record

CVE
CVE-2026-19543
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
IBM
Product
IBM Common Licensing
Classifications
CWE-20
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 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=Agent 9.0
  2. Affected versionversion=Agent 9.0.0.1
  3. Affected versionversion=Agent 9.0.0.2
  4. Affected versionversion=ART 9.0
  5. Affected versionversion=ART 9.0.0.1
  6. Affected versionversion=ART 9.0.0.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

IBM · IBM Common Licensingversion=Agent 9.0; version=Agent 9.0.0.1; version=Agent 9.0.0.2; version=ART 9.0; version=ART 9.0.0.1; version=ART 9.0.0.2

Published CVSS scores

6.2IBMCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation

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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