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CVE-2026-16340 IBM CVE debrief

IBM DataPower Gateway Out-of-bounds Write vulnerability allows remote attackers to execute arbitrary code due to a flaw in the RFC2047 encoded-word parser. Defenders should assess exposure and prioritize patching to prevent potential remote code execution. The vulnerability affects various versions of IBM DataPower Gateway, including 10.5.0.0 through 10.5.0.22, 10.6.1 through 10.6.6, 10.6.0.0 through 10.6.0.10, and 11.0.0.0 through 11.0.0.2. The CVE record and source item provide details on the vulnerability, but limited information is available on exploitation or impact.

Vendor
IBM
Product
DataPower Gateway 10.6CD
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-08
Original CVE updated
2026-10-08
Advisory published
2026-10-08
Advisory updated
2026-10-08

Who should care

Defenders responsible for IBM DataPower Gateway instances should assess exposure and prioritize patching to prevent potential remote code execution. This includes reviewing and applying patches from IBM, inventorying and assessing exposure of DataPower Gateway instances, and monitoring for suspicious activity. Security teams and operators managing IBM DataPower Gateway should be aware of the vulnerability and take必要的

Why it matters

The vulnerability in IBM DataPower Gateway could allow remote attackers to execute arbitrary code, requiring defenders to assess exposure and prioritize patching.

  • Potential remote code execution
  • Requires verification of affected versions and exposure
  • Patching priority for DataPower Gateway instances

Technical summary

The IBM DataPower Gateway is vulnerable to an out-of-bounds write in the RFC2047 encoded-word parser, potentially allowing remote attackers to execute arbitrary code. The vulnerability affects various versions of IBM DataPower Gateway. The CVSS score is 9.8, indicating a CRITICAL severity. Defenders should assess exposure and prioritize patching to prevent potential remote code execution.

Defensive priority

High

Recommended defensive actions

  • Review and apply patches from IBM
  • Inventory and assess exposure of DataPower Gateway instances
  • Monitor for suspicious activity

Evidence notes

The CVE record and source item provide details on the vulnerability, but limited information is available on exploitation or impact. Defenders should verify affected versions and exposure, and review vendor guidance for patching. The vulnerability has a CVSS score of 9.8 and a severity of CRITICAL. The CVE record was published on 2026-10-08T13:09:18.739Z and has not been modified since then. There are no known ransomware campaigns using this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-16340 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-16340

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

  • CVE-2026-16340 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-16340

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

Supplemental references

  • IBM DataPower Gateway Out-of-bounds Write

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/16xxx/CVE-2026-16340.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://www.ibm.com/support/pages/node/7289775

    Supplemental source - vendor-advisory, patch

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.