What is CVE-2020-4471?

CVE-2020-4471 is a medium-severity vulnerability in IBM Spectrum Protect Plus, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2020-06-15.

How severe is CVE-2020-4471?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in IBM Spectrum Protect Plus

CVE-2020-4471

IBM Spectrum Protect Plus 10.1.0 through 10.1.5 could allow an unauthenticated attacker to cause a denial of service or hijack DNS sessions by send a specially crafted HTTP command to the remote server. IBM X-Force ID: 181726.

Vulnerability class: Broken Authentication

Published 2020-06-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.

EPSS exploit prediction

EPSS: 0.027 (85.1th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 85.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.027 · newest: 0.027 · change: 0.000

Affected products

IBM Spectrum Protect Plus — versions 10.1.0, 10.1.5
IBM Spectrum Protect Plus

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

www.ibm.com/support/pages/node/6221358 (Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/181726 (VDB Entry, vdb-entry, Vendor Advisory)
www.tenable.com/security/research/tra-2020-37 (Third Party Advisory)

Frequently asked questions

What is CVE-2020-4471?: CVE-2020-4471 is a medium-severity vulnerability in IBM Spectrum Protect Plus, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2020-06-15.
How severe is CVE-2020-4471?: Medium severity. CVSS v3 base score is 6.5 out of 10.