Vulnerability Monitor

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CVE-2025-34520

An authentication bypass vulnerability in Arcserve Unified Data Protection (UDP) allows unauthenticated attackers to gain unauthorized access to protected functionality or user accounts. By manipulating specific request parameters or exploiting a logic flaw, an attacker can bypass login mechanisms without valid credentials and access administrator-level features. This vulnerability affects all UDP versions prior to 10.2. UDP 10.2 includes the necessary patches and requires no action. Versions 8.0 through 10.1 are supported and require either patch application or upgrade to 10.2. Versions 7.x and earlier are unsupported or out of maintenance and must be upgraded to 10.2 to remediate the issue.

Published

2025-08-27T22:15:57.703

Last Modified

2025-09-09T15:01:02.443

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 9.8 (CRITICAL)

Weaknesses

Type: Secondary
CWE-288

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	arcserve	udp	< 7.0	Yes
Application	arcserve	udp	< 10.2	Yes
Application	arcserve	udp	7.0	Yes
Application	arcserve	udp	7.0	Yes
Application	arcserve	udp	7.0	Yes

References

https://support.arcserve.com/s/article/Important-Security-Bulletin-Must-read-for-all-Arcserve-UDP-customers-on-all-versions Vendor Advisory ([email protected])