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PatchSiren cyber security CVE debrief

CVE-2026-18104 IBM CVE debrief

IBM Db2 Mirror for i 7.6, 7.5, and 7.4 uses the AES Electronic Codebook (ECB) mode for encryption. This encryption mode could allow a local attacker to obtain sensitive information. Defenders should assess exposure and consider alternative encryption modes. The CVE description notes this vulnerability, and defenders should verify encryption modes in local deployments. Affected product deployments require review to confirm existence and assign an owner for follow-up. The use of ECB mode requires verification and potential updates. Defenders should prioritize verifying encryption modes and assessing exposure in local deployment contexts.

Vendor
IBM
Product
Db2 Mirror for i
CVSS
LOW 3.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-24
Original CVE updated
2026-09-26
Advisory published
2026-09-24
Advisory updated
2026-09-26

Who should care

Defenders and administrators responsible for IBM Db2 Mirror for i deployments should assess exposure and consider alternative encryption modes.

Why it matters

The use of AES ECB mode for encryption in IBM Db2 Mirror for i 7.6, 7.5, and 7.4 could allow local attackers to obtain sensitive information. Defenders should prioritize verifying encryption modes and assessing exposure in local deployment contexts.

  • Local attackers may be able to obtain sensitive information
  • Encryption mode usage requires verification and potential updates
  • Defenders should assess exposure in local deployment contexts

Technical summary

IBM Db2 Mirror for i 7.6, 7.5, and 7.4 uses the AES Electronic Codebook (ECB) mode for encryption. A local attacker could potentially obtain sensitive information due to this encryption mode. The encryption mode usage requires verification and potential updates. Defenders should assess exposure in local deployment contexts and consider alternative encryption modes. The CVE description notes the use of AES ECB mode for encryption in IBM Db2 Mirror for i 7.6, 7.5, and 7.4.

Defensive priority

Defenders should prioritize verifying encryption modes and assessing exposure in local deployment contexts.

Recommended defensive actions

  • Verify encryption modes used in local IBM Db2 Mirror for i deployments
  • Assess exposure and potential impact of ECB mode usage
  • Consider alternative encryption modes

Evidence notes

The CVE description notes the use of AES ECB mode for encryption in IBM Db2 Mirror for i 7.6, 7.5, and 7.4, which could allow a local attacker to obtain sensitive information.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-18104 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-18104

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-18104 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-18104

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.