CVE-2021-20517

8.8 highEPSS 1.9%

High (8.8) in ibm websphere application server nd. EPSS 1.9% chance of exploitation in the next 30 days.

IBM WebSphere Application Server Network Deployment 8.5 and 9.0 could allow a remote authenticated attacker to traverse directories. An attacker could send a specially-crafted URL request containing "dot dot" sequences (/../) to read and delete arbitrary files on the system. IBM X-Force ID: 198435.

Severity

CVSS 3.1

8.8 high

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

EPSS: 1.9% chance of exploitation in the next 30 days; higher than 79% of CVEs (scores of 2026-10-31)
CWE: CWE-22
Published: 2021-06-07
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

ibm:websphere_application_server_nd

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/198435
https://www.ibm.com/support/pages/node/6456955
https://exchange.xforce.ibmcloud.com/vulnerabilities/198435
https://www.ibm.com/support/pages/node/6456955

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