VDB-321658 · CVE-2025-34523 · EUVD-2025-26166

Arcserve Unified Data Protection up to 10.1 heap-based overflow

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8.7	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Arcserve Unified Data Protection up to 10.1. The impacted element is an unknown function. Executing a manipulation can lead to heap-based overflow. This vulnerability appears as CVE-2025-34523. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Arcserve Unified Data Protection up to 10.1. It has been declared as critical. This vulnerability affects an unknown functionality. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A heap-based buffer overflow vulnerability exists in the network-facing input handling routines of Arcserve Unified Data Protection (UDP). This flaw is reachable without authentication and results from improper bounds checking when processing attacker-controlled input. By sending specially crafted data, a remote attacker can corrupt heap memory, potentially causing a denial of service or enabling arbitrary code execution depending on the memory layout and exploitation techniques used. This vulnerability is similar in nature to CVE-2025-34522 but affects a separate code path or component. No user interaction is required, and exploitation occurs in the context of the vulnerable process. 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.

The weakness was presented by watchTowr. The advisory is available at support.arcserve.com. This vulnerability was named CVE-2025-34523 since 04/15/2025. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available.

Upgrading to version 10.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-26166). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

Arcserve

Name

Unified Data Protection

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 8.9
VulDB Meta Temp Score: 8.7

VulDB Base Score: 8.1
VulDB Temp Score: 7.7
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Unified Data Protection 10.2

Timelineinfo

04/15/2025 CVE reserved
08/28/2025 +135 days Advisory disclosed
08/28/2025 +0 days VulDB entry created
05/26/2026 +271 days VulDB entry last update

Sourcesinfo

Advisory: support.arcserve.com
Researcher: watchTowr
Status: Confirmed

CVE: CVE-2025-34523 (🔒)
GCVE (CVE): GCVE-0-2025-34523
GCVE (VulDB): GCVE-100-321658
EUVD: 🔒

Entryinfo

Created: 08/28/2025 07:24
Updated: 05/26/2026 16:33
Changes: 08/28/2025 07:24 (67), 08/29/2025 14:38 (1), 09/09/2025 16:46 (11), 05/26/2026 16:33 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.