Critical 9.2Published Aug 27, 2025

CVE-2025-34522Arcserve UDP < 10.2 Pre-Authentication Heap Overflow

Updated under an hour ago (Oct 26, 2026, 11:30 AM ET)

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It affects Arcserve Unified Data Protection (UDP) and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Arcserve Unified Data Protection (UDP)

Exploited in the last 30 days

A heap-based buffer overflow vulnerability exists in the input parsing logic of Arcserve Unified Data Protection (UDP). This flaw can be triggered without authentication by sending specially crafted input to the target system. Improper bounds checking allows an attacker to overwrite heap memory, potentially leading to application crashes or remote code execution. Exploitation occurs in the context of the affected process and does not require user interaction. The vulnerability poses a high risk due to its pre-authentication nature and potential for full compromise. 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.

CVSS: 9.2 CRITICAL (v4.0, CNA)CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness (CWE): CWE-122
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Analyzed
Record last updated: May 15, 2026
First seen by InfoSec Signals: Oct 23, 2026

Affected products

Affected products

Arcserve Unified Data Protection (UDP) arcserve:unified_data_protection_udp (from the name)	10.2 not affected; from 8.0 through 10.1; through 7.*	CNA record
arcserve udp arcserve:udp	before 7.0; from 8.0 before 10.2; 7.0; 7.0; 7.0	NVD

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.