CVE-2020-4534

Name: CVE-2020-4534
Creator: NVD / NIST
Published: 2020-08-03T13:15:11.497+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.41%

Last modified Jun 17, 2026

CVE-2020-4534 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. IBM WebSphere Application Server 7.0, 8.0, 8.5, and 9.0 could allow a local authenticated attacker to gain elevated privileges on the system, caused by improper handling of UNC paths. By scheduling a task with a specially-crafted UNC path, an attacker could exploit this vulnerability to execute arbitrary code with higher privileges. EPSS estimates a 0.41% chance of exploitation in the next 30 days.

Description

IBM WebSphere Application Server 7.0, 8.0, 8.5, and 9.0 could allow a local authenticated attacker to gain elevated privileges on the system, caused by improper handling of UNC paths. By scheduling a task with a specially-crafted UNC path, an attacker could exploit this vulnerability to execute arbitrary code with higher privileges. IBM X-Force ID: 182808.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS Probability

0.41%

32.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Ibm	Websphere Application Server	7.0
Ibm	Websphere Application Server	8.0
Ibm	Websphere Application Server	8.5
Ibm	Websphere Application Server	9.0

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/182808VDB Entry, Vendor Advisory
https://www.ibm.com/support/pages/node/6255074Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/182808VDB Entry, Vendor Advisory
https://www.ibm.com/support/pages/node/6255074Vendor Advisory

Timeline

Published: Aug 3, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-4534?

How severe is CVE-2020-4534?

CVE-2020-4534 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.

How do I fix CVE-2020-4534?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-4534?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST