CVE-2026-81574Network attack vector

Crash and memory disclosure via logger format strings

Published Aug 27, 2026 · Updated Aug 27, 2026

Format-string injection in the logger in WIBU-SYSTEMS AG CodeMeter Runtime before 8.41a and 9.10 allows attackers to crash the service. The logger interprets unsanitized proxy-setting strings as printf-style format strings, exposing process memory and stack canaries or terminating CodeMeter. Local users can supply the value with cmu --set-proxy; remote attackers must first set General.ProxyServer through the separately disclosed configuration flaw.

CVSS severity8.2
High
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Format-string injection in the logger in WIBU-SYSTEMS AG CodeMeter Runtime before 8.41a and 9.10 allows attackers to crash the service. The logger interprets unsanitized proxy-setting strings as printf-style format strings, exposing process memory and stack canaries or terminating CodeMeter. Local users can supply the value with cmu --set-proxy; remote attackers must first set General.ProxyServer through the separately disclosed configuration flaw.

The record

CVE
CVE-2026-81574
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
WIBU-SYSTEMS AG
Product
CodeMeter Runtime
Classifications
CWE-134, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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=7.00
  2. Affected versionversion=8.00 <8.41a
  3. Affected versionversion=9.00 <9.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WIBU-SYSTEMS AG · CodeMeter Runtimeversion=7.00; version=8.00 <8.41a; version=9.00 <9.10

Published CVSS scores

8.2WIBU-SYSTEMS AGCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-134Use of Externally-Controlled Format String
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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