CVE-2025-34523 Arcserve UDP < 10.2 Pre-Authentication Heap Overflow
Remote attackers can trigger a heap overflow in Arcserve UDP without authentication, potentially leading to arbitrary code execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-34523?
CVE-2025-34523 is a critical memory corruption vulnerability in Arcserve Unified Data Protection (UDP), published on 27 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-122
Which versions are affected by CVE-2025-34523?
It affects 1 product.
Products include Arcserve Udp.
How do I fix CVE-2025-34523?
No fix has been published for CVE-2025-34523 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-34523 being exploited?
There is no known exploitation of CVE-2025-34523 in the wild and no public exploit code.
Other vulnerabilities in Arcserve Unified Data Protection (UDP)
- CVE-2015-4068 Arcserve Unified Data Protection (UDP) Directory Traversal
- CVE-2024-0799 Authentication Bypass via wizardLogin in Arcserve Unified Data Protection
- CVE-2023-41998 Arcserve UDP Unauthenticated RCE
- CVE-2023-41999 Arcserve UDP Management Authentication Bypass
- CVE-2023-42000 Arcserve UDP Agent Unauthenticated Path Traversal File Upload
Sources
Also known as GHSA-5xjx-j6c2-6ghq.