TI-2025-24544 Aliases CVE-2025-34520 GHSA-27qr-6rgm-2f59

Arcserve UDP < 10.2 Authentication Bypass

LOW 36CWE-288Published 2025-08-27 · Updated 2026-05-15

Key facts

Attack vector: Adjacent network
Privileges required: None
User interaction: None
Attack complexity: High
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-288.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00369 30th percentileScored 2026-11-07

Fix Fixed Unified Data Protection (UDP) (Arcserve): 10.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Arcserve	Unified Data Protection (UDP)	8.0 – 10.1; all versions	10.2	Patch available	CNA

Unified Data Protection (UDP) VendorArcserve Affected 8.0 – 10.1; all versions Fixed in 10.2 Patch available CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:a:arcserve:udp::::::::	before 7.0; 8.0 to before 10.2	Vulnerable	Arcserve
cpe:2.3:a:arcserve:udp:7.0:-::::::	7.0	Vulnerable	Arcserve
cpe:2.3:a:arcserve:udp:7.0:update_1::::::	7.0 update_1	Vulnerable	Arcserve
cpe:2.3:a:arcserve:udp:7.0:update_2::::::	7.0 update_2	Vulnerable	Arcserve

cpe:2.3:a:arcserve:udp:*:*:*:*:*:*:*:* Versions before 7.0; 8.0 to before 10.2 Vulnerable ·Arcserve
cpe:2.3:a:arcserve:udp:7.0:-:*:*:*:*:*:* Versions 7.0 Vulnerable ·Arcserve
cpe:2.3:a:arcserve:udp:7.0:update_1:*:*:*:*:*:* Versions 7.0 update_1 Vulnerable ·Arcserve
cpe:2.3:a:arcserve:udp:7.0:update_2:*:*:*:*:*:* Versions 7.0 update_2 Vulnerable ·Arcserve

Remediation

Fix · CNA Unified Data Protection (UDP) (Arcserve) Fixed in 10.2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Advisory · 2025-08-27
Arcserve Unified Data Protection (UDP) — support.arcserve.com/s/article/Important-Security-Bulletin-…
4 records Highest priority Priority MEDIUM 2 MEDIUM, 2 LOW
Other records, highest priority first
- TI-2025-24547 Arcserve UDP < 10.2 Pre-Authentication Heap OverflowPriority MEDIUM 42
- TI-2025-24546 Arcserve UDP < 10.2 Pre-Authentication Heap OverflowPriority MEDIUM 42
- TI-2025-24545 Arcserve UDP < 10.2 Reflected Cross-Site Scripting (XSS)Priority LOW 21
Show all 4 records → Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2025-34520
2026-10-03 Alias added: GHSA-27qr-6rgm-2f59

References

Patch 1

https://support.arcserve.com/s/article/Important-Security-Bulletin-Must-read-for-all-Arcserve-UDP-customers-on-all-versions

TI-2015-03429 Directory traversal vulnerability in Arcserve UDP before 5.0 Update 4 allows remote… KEVCVSS 3.1CRITICAL 9.1
TI-2024-00736 Authentication Bypass via wizardLogin in Arcserve Unified Data Protection CVSS 3.1CRITICAL 9.8
TI-2023-11421 Arcserve UDP through 9.0.6034 allows authentication bypass. CVSS 3.1CRITICAL 9.8
TI-2024-00737 Authentication Bypass via wizardLogin in Arcserve Unified Data Protection CVSS 3.1HIGH 8.8
TI-2024-00738 Unauthenticated DoS in Arcserve Unified Data Protection CVSS 3.1HIGH 7.5
TI-2023-22379 Arcserve UDP Unauthenticated RCE CVSS 3.1CRITICAL 9.8

See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences