CVE-2023-42000: Arcserve UDP Agent Unauthenticated Path Traversal File Upload

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-11-27 · updated 2026-06-17
Weakness: CWE-22

Description

Arcserve UDP prior to 9.2 contains a path traversal vulnerability in com.ca.arcflash.ui.server.servlet.FileHandlingServlet.doUpload(). An unauthenticated remote attacker can exploit it to upload arbitrary files to any location on the file system where the UDP agent is installed.

Affected products

Arcserve Unified Data Protection (UDP): before 9.2 — fixed in 9.2

How to fix

Upgrade to a fixed version: Arcserve Unified Data Protection (UDP) 9.2. Check the vendor advisory for mitigations.

References

https://www.tenable.com/security/research/tra-2023-37
https://www.tenable.com/security/research/tra-2023-37

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