Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Network-accessible service, no authentication per description and vendor report, arbitrary file write yields high integrity impact with minor availability side-effect.
Primary rating from Vendor (ibm).
CVSS VectorNVD
Lifecycle Timeline
3DescriptionNVD
IBM Db2 Mirror for i 7.4, 7.5, and 7.6 could allow a remote attacker to write arbitrary files due to improper limitation of a pathname to a restricted directory.
AnalysisAI
Arbitrary file write via path traversal in IBM Db2 Mirror for i versions 7.4, 7.5, and 7.6 exposes systems to unauthenticated remote exploitation. The flaw stems from improper pathname restriction (CWE-22), enabling an attacker to escape the intended directory sandbox and write files to arbitrary filesystem locations. No active exploitation has been confirmed in CISA KEV, and no public proof-of-concept exploit is known at the time of analysis, though the CVSS 8.2 High rating and network-accessible attack vector make this a credible priority for organizations running IBM i environments.
Technical ContextAI
IBM Db2 Mirror for i is a high-availability and disaster-recovery replication product designed for the IBM i (formerly AS/400) platform, enabling near-real-time mirroring of Db2 for i databases between systems. The vulnerability is classified under CWE-22 (Improper Limitation of a Pathname to a Restricted Directory), commonly known as path traversal. This class of flaw occurs when user-controlled input containing sequences such as '../' or encoded equivalents is not sanitized before being used to construct file system paths, allowing traversal outside a restricted root directory. The affected CPE is cpe:2.3:a:ibm:db2_mirror_for_i:*:*:*:*:*:*:*:* covering all sub-versions of releases 7.4, 7.5, and 7.6. Because Db2 Mirror for i operates as a network service facilitating replication, a writable endpoint exposed over the network is the likely attack surface.
RemediationAI
A vendor-released patch is available from IBM; apply the appropriate fix per the IBM support advisory at https://www.ibm.com/support/pages/node/7283359. No exact patched version number was disclosed in the available data - administrators should consult the advisory directly to identify the required Program Temporary Fix (PTF) for their IBM i release level (7.4, 7.5, or 7.6). As a compensating control prior to patching, restrict network access to Db2 Mirror for i replication endpoints using host-based packet rules or network firewall ACLs to permit connections only from known replication partner IP addresses; this directly limits the remote unauthenticated attack surface indicated by the CVSS vector. Note that ACL-based restriction does not eliminate the vulnerability and does not substitute for patching, but substantially reduces the realistic attacker pool in environments where the service cannot be immediately patched.
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Same weakness CWE-22 – Path Traversal
View allSame technique Path Traversal
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-58797
GHSA-8hvx-mqvc-3w73