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Vulnerability · Published Oct 8, 2026 · Assigned by ibm

CVE-2026-16340IBM DataPower Gateway Out-of-bounds Write

Critical 9.8

In plain English

A critical-severity out-of-bounds write in DataPower Gateway 10.5.0 from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.5%top 57.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

IBM DataPower Gateway 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 could allow a remote attacker to execute arbitrary code due to an out-of-bounds write in the RFC2047 encoded-word parser.

Affected products (as reported)

VendorProductVersions
IBM DataPower Gateway 10.6CD 10.6.1 – through 10.6.6
IBM DataPower Gateway 10.6.0 10.6.0.0 – through 10.6.0.10
IBM DataPower Gateway 11.0.0 11.0.0.0 – through 11.0.0.2
IBM DataPower Gateway 10.5.0 10.5.0.0 – through 10.5.0.22

Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References