Vulnerability-Lookup

FKIE_CVE-2025-34520

Vulnerability from fkie_nvd - Published: 2025-08-27 22:15 - Updated: 2025-09-09 15:01

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

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.

References

	URL	Tags
	disclosure@vulncheck.com	https://support.arcserve.com/s/article/Important-Security-Bulletin-Must-read-for-all-Arcserve-UDP-customers-on-all-versions	Vendor Advisory

Impacted products

Vendor	Product	Version
arcserve	udp	*
arcserve	udp	*
arcserve	udp	7.0
arcserve	udp	7.0
arcserve	udp	7.0

JSON

To clipboard

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}

CVE-2025-34520 (GCVE-0-2025-34520)

Vulnerability from cvelistv5 – Published: 2025-08-27 21:19 – Updated: 2026-05-15 11:15

Title

Arcserve UDP < 10.2 Authentication Bypass

Summary

Severity

7.7 (High)


                        
                          CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-288 - Authentication Bypass Using an Alternate Path or Channel

Assigner

VulnCheck

References

1 reference

URL	Tags
https://support.arcserve.com/s/article/Important-…	vendor-advisorypatch

Impacted products

1 product

Vendor	Product	Version
Arcserve	Unified Data Protection (UDP)	Unaffected: 10.2 Affected: 8.0 , ≤ 10.1 (custom) Affected: 0 , ≤ 7.* (custom)

Credits

watchTowr

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2025-34520

CVE-2025-34520 (GCVE-0-2025-34520)

Tags

Sightings

Nomenclature