CVE-2025-34523
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk43th percentile - higher than 43% of all known CVEs
Summary
A heap-based buffer overflow vulnerability exists in the network-facing input handling routines of Arcserve Unified Data Protection (UDP). It is reachable without authentication and results from improper bounds checking when processing attacker-controlled input.
Risk Assessment
A remote attacker can corrupt heap memory, potentially causing a denial of service or enabling arbitrary code execution, posing a high risk to organizations using UDP versions prior to 10.2.
Recommendation
Update Arcserve UDP to version 10.2 or apply appropriate patches for versions 8.0–10.1; versions 7.x and earlier require upgrading to 10.2.
Other vulnerabilities in Arcserve Unified Data Protection
See all- CVE-2025-34522Critical
A heap-based buffer overflow vulnerability exists in the input parsing logic of Arcserve Unified Data Protection (UDP). It can be triggered without authentication by sending specially crafted input, potentially leading to application crashes or remote code execution.
- CVE-2025-34520Critical
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 request parameters or exploiting a logic flaw, an attacker can bypass login mechanisms and access administrator-level features. This affects all UDP versions prior to 10.2.
- CVE-2025-34521Medium
A reflected cross-site scripting (XSS) vulnerability exists in the web interface of Arcserve Unified Data Protection (UDP), where unsanitized user input is improperly reflected in HTTP responses. Remote attackers with low privileges can craft malicious links that, when visited by another user, execute arbitrary JavaScript in the victim's browser. Successful exploitation may lead to session hijacking, credential theft, or other client-side impacts. The vulnerability affects all UDP versions prior to 10.2; versions 8.0 through 10.1 require patch or upgrade to 10.2; versions 7.x and earlier must be upgraded to 10.2.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS