What is CVE-2021-39066?

CVE-2021-39066 is a high-severity vulnerability in IBM Financial Transaction Manager, classified under Session Fixation. CVSS score: 8.8/10. Published 2022-02-02.

How severe is CVE-2021-39066?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in IBM Financial Transaction Manager

CVE-2021-39066

IBM Financial Transaction Manager 3.2.4 does not invalidate session any existing session identifier gives an attacker the opportunity to steal authenticated sessions. IBM X-Force ID: 215040.

Published 2022-02-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (49.9th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

IBM Financial Transaction Manager — versions 3.2.4

Weakness classification (CWE)

CWE-384 — Session Fixation

References

www.ibm.com/support/pages/node/6527892 (Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/215040 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2021-39066?: CVE-2021-39066 is a high-severity vulnerability in IBM Financial Transaction Manager, classified under Session Fixation. CVSS score: 8.8/10. Published 2022-02-02.
How severe is CVE-2021-39066?: High severity. CVSS v3 base score is 8.8 out of 10.