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PatchSiren cyber security CVE debrief

CVE-2026-18849 IBM CVE debrief

IBM OpenBMC FW1060.00 through FW1060.80 is affected by a vulnerability in the BMC firmware update process. An attacker with authenticated administrator-level access to the BMC can, under specific conditions, execute arbitrary code, resulting in a confidentiality, integrity, and availability impact. This vulnerability has been identified in the BMC firmware update process, which requires defenders to focus on restricting access and verifying firmware authenticity. Organizations should verify their deployments and review compensating controls.

Vendor
IBM
Product
OPENBMC
CVSS
MEDIUM 6.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-19
Original CVE updated
2026-09-02
Advisory published
2026-08-19
Advisory updated
2026-09-02

Who should care

Organizations using IBM OpenBMC FW1060.00 through FW1060.80, administrators with access to BMC firmware update process, security teams responsible for vulnerability management, and operators of affected systems should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability in IBM OpenBMC FW1060.00 through FW1060.80 allows an attacker with authenticated administrator-level access to the BMC to execute arbitrary code under specific conditions, impacting confidentiality, integrity, and availability. This requires defenders to focus on restricting access to the BMC firmware update process and verifying the authenticity of firmware updates. Defenders should also monitor BMC logs for suspicious activity related to firmware updates and review compensating controls for exposed systems.

Defensive priority

Medium priority due to authenticated administrator-level access requirement and potential for code execution

Recommended defensive actions

  • Inventory and verify IBM OpenBMC FW1060.00 through FW1060.80 installations
  • Check for and apply any available firmware updates from IBM
  • Restrict access to BMC firmware update process to prevent unauthorized modifications
  • Monitor BMC logs for suspicious activity related to firmware updates
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

Evidence from IBM and NVD indicates a vulnerability in IBM OpenBMC FW1060.00 through FW1060.80. Limited details are available on the specific conditions for exploitation. Defenders should verify the authenticity of firmware updates and monitor for suspicious activity related to BMC firmware updates.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-18849 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-18849

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

  • CVE-2026-18849 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-18849

    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.