CVE-2026-16689: IBM App Connect Enterprise and IBM Integration Bus for z/OS Adapter nodes are vulnerable to multiple CVEs

3

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

Technical severity (medium)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

—

No EPSS score.

Affects

Ibm

App Connect Enterprise and 1 more

CVSS base

5.5

Medium · 3 source(s)

Prioritization reference: 6.2 provisional

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

None

none · proof-of-concept · active

Automatable

No

can an attacker script the kill-chain steps

Technical impact

Partial

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

Documented patch — www.ibm.com (NIST National Vulnerability Database)

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Ibm App Connect Enterprise, Ibm Integration Bus for z/OS).
Apply the fixed version or the patch documented under Remediation.
Search available logs for exploit probes matching the vulnerability class (info disclosure), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Ibm	App Connect Enterprise	≥ 12.0.1.0 and < 12.0.12.29≥ 13.0.1.0 and < 13.0.8.2	Vulnerable	NIST National Vulnerability Database
Ibm	App Connect Enterprise	≥ 13.0.1.0 and ≤ 13.0.8.1≥ 12.0.1.0 and ≤ 12.0.12.28	Vulnerable	CVE Program (cve.org) e CISA ADP
Ibm	Integration Bus for z/OS	≥ 10.1.0.0 and ≤ 10.1.0.7	Vulnerable	NIST National Vulnerability Database
Ibm	Integration Bus for z/OS	≥ 10.1.0.0 and ≤ 10.1.0.7	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Local

Attack complexity

Low

Privileges required

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
6.2	CVSS 3.1	Medium	2.5	3.6	psirt@us.ibm.com via NIST National Vulnerability Database
6.2	CVSS 3.1	Medium	—	—	ibm via CVE Program (cve.org) e CISA ADP
5.5	CVSS 3.1	Medium	1.8	3.6	nvd@nist.gov via NIST National Vulnerability Database

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N (score shown at the top: nvd@nist.gov)

Scoring entities (NIST, CNA, ADP) score independently; each score is shown with its origin. For prioritization we use 6.2 (psirt@us.ibm.com via NIST National Vulnerability Database) as a conservative provisional reference — not a definitive official score.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-532 · Insertion of Sensitive Information into Log File

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
Look for anomalous data read/export volumes and access to sensitive records.

endpoint telemetry (EDR)application logsauthentication logs

Timeline

What happened to this CVE, newest first.

2026
Affected products added · ibm/app connect enterprise, ibm/integration bus for z/os
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 15, 2026
Fix documented
Oct 15, 2026 · NIST National Vulnerability Database
CVSS changed · 5.5
Oct 15, 2026 · NIST National Vulnerability Database
Source status changed · → Analyzed
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Sep 4, 2026 · ibm

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

1 on the record

www.ibm.com/support/pages/node/7286372
Patch, Vendor Advisory, vendor-advisory, patch, NIST National Vulnerability Database

Elsewhere on this site

Ibm
every CVE for this vendor

Info disclosure
same class

CWE-532
other pages naming this weakness

Related CVEs (same products)

High CVE-2026-17416 IBM App Connect Enterprise Toolkit is vulnerable to arbitrary code execution due to multiple CVEs Sep 14, 2026
High CVE-2026-17133 IBM App Connect Enterprise Toolkit is vulnerable to arbitrary code execution due to multiple CVEs Sep 14, 2026
High CVE-2026-17156 IBM App Connect Enterprise Toolkit is vulnerable to arbitrary code execution due to multiple CVEs Sep 14, 2026
High CVE-2026-75624 IBM App Connect Enterprise is vulnerable to privilege escalation and Denial of Service Sep 10, 2026
Medium CVE-2026-17442 IBM App Connect Enterprise and IBM Integration Bus for z/OS Adapter nodes are vulnerable to multiple CVEs Sep 4, 2026
Medium CVE-2026-17444 IBM App Connect Enterprise and IBM Integration Bus for z/OS Adapter nodes are vulnerable to multiple CVEs Sep 4, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No FIRST EPSS score.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-16689 is "IBM App Connect Enterprise and IBM Integration Bus for z/OS Adapter nodes are vulnerable to multiple CVEs", rated Medium. It affects App Connect Enterprise (Ibm); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 5.5 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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