What is CVE-2021-20354?

CVE-2021-20354 is a high-severity vulnerability in HP Hp-Ux, classified under Path Traversal. CVSS score: 7.5/10. Published 2021-02-18.

How severe is CVE-2021-20354?

High severity. CVSS v3 base score is 7.5 out of 10.

Path Traversal in HP Hp-Ux

CVE-2021-20354

IBM WebSphere Application Server 8.0, 8.5, and 9.0 could allow a remote attacker to traverse directories. An attacker could send a specially-crafted URL request containing "dot dot" sequences (/../) to view arbitrary files on the system. IBM X-Force ID: 194883.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2021-02-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.041 (90.4th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 90.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.037 · newest: 0.041 · change: +0.004

Affected products

HP Hp-Ux
IBM Aix
IBM I
IBM Websphere Application Server — versions 8.0, 8.5, 9.0
IBM Websphere Application Server
IBM Z\/os
Linux Kernel
Microsoft Windows
Oracle Solaris

Weakness classification (CWE)

CWE-22 — Path Traversal

References

www.ibm.com/support/pages/node/6415959 (Patch, Vendor Advisory)
exchange.xforce.ibmcloud.com/vulnerabilities/194883 (VDB Entry, vdb-entry, Vendor Advisory)

Frequently asked questions

What is CVE-2021-20354?: CVE-2021-20354 is a high-severity vulnerability in HP Hp-Ux, classified under Path Traversal. CVSS score: 7.5/10. Published 2021-02-18.
How severe is CVE-2021-20354?: High severity. CVSS v3 base score is 7.5 out of 10.