What is the CVSS score of CVE-2026-13293?

CVE-2026-13293 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.6%.

IBM CVE-2026-13293

EUVD-2026-78152 HIGH

Deserialization of Untrusted Data (CWE-502)

2026-09-14 psirt@us.ibm.com

GHSA-mqj8-gj7g-c998

RCE Deserialization IBM

8.8

CVSS 3.1 · Vendor: us

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Vulnerability Assessment

Weakness

CWE

CWE-502

OWASP Top 10:2025

A08:2025 - Software or Data Integrity Failures

ASVS 5.0

V1 - Encoding and Sanitization Safe deserialization, type allowlists

MITRE ATT&CK

2 techniques across 2 tactics: Execution, Initial Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.6% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 15, 2026

Remote code execution affects IBM MQ across the 9.1 LTS, 9.2 LTS, 9.3 LTS/CD, 9.4 LTS/CD and 10.0.0.0 release lines because the queue manager deserializes untrusted data (CWE-502), letting an attacker who can already authenticate to the messaging service run arbitrary code under the broker's privileges. The flaw carries a CVSS 3.1 base of 8.8 (AV:N/AC:L/PR:L/UI:N, high confidentiality, integrity and availability impact) and rates as a credentials-gated but fully compromising issue for any exposed MQ listener. No CISA KEV listing, EPSS score, or public proof-of-concept was present in the supplied intelligence, so active exploitation is unconfirmed at time of analysis; patch availability is signalled by the IBM PSIRT advisory but no fixed build number is stated in the source data.

Affected VersionsENISA

MQ 9.4.0.0 ≤9.4.0.25 LTS

MQ 9.4.0.0 ≤9.4.5.1 CD

MQ 9.3.0.0 ≤9.3.0.41 LTS

MQ 9.2.0.0 ≤9.2.0.43 LTS

MQ 9.3.0.0 ≤9.3.5.1 CD

MQ 9.1.0.0 ≤9.1.0.37 LTS

MQ 10.0.0.0

Affected Packages

euvd mq no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (us) PRIMARY 8.8 HIGH

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from Vendor (us) · only source for this CVE.

CVSS VectorVendor: us

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

DescriptionCVE.org

IBM MQ 9.1.0.0 through 9.1.0.37 LTS, 9.2.0.0 through 9.2.0.43 LTS, 9.3.0.0 through 9.3.0.41 LTS, 9.3.0.0 through 9.3.5.1 CD, 9.4.0.0 through 9.4.0.25 LTS, 9.4.0.0 through 9.4.5.1 CD, and 10.0.0.0 could allow a remote authenticated attacker to execute arbitrary code on the system due to the deserialization of untrusted data.

Threat Intelligence Overview

EPSS Score

0.6%

Top 55% exploitable

Data Quality

4 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.6%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +1

CVSS: +44

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Insecure Deserialization CRITICAL

Insecure deserialization occurs when an application converts serialized data (a stream of bytes representing an object's state) back into a living object without proper validation.

Remote Code Execution CRITICAL

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.