6.5

CVE-2026-11549: ibm cics tx advanced Improper Access Control

CVSS: 6.5v3.1MediumAwaiting analysis
Published 18-09-2026Last modified 18-09-2026
Open JSON

Vulnerability summary

CVE-2026-11549 is a medium (CVSS 6.5) Improper Access Control vulnerability in ibm cics tx advanced. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 12.9% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.23%
0%100%
Low · -0.09 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 18-09-2026
    PublishedVulnerability first disclosed.
  2. 18-09-2026
    Last modifiedVulnerability information updated.

Description

IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by a virtual host bypass vulnerability.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.23%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

-0.09 pp

From 0.31% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.23%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ibm1 product

1 vendor · 1 product

References

1 links