Vulnerability · CVE-2025-34522
A heap-based buffer overflow vulnerability exists in the input parsing logic of Arcserve Unified Data Protection (UDP).
Published Aug 27, 2025 · catalog updated May 15, 2026 · Arcserve Unified Data Protection (UDP)
Last checked Oct 30, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2025-34522. EPSS is 0.56%. Act only if a listed version of Arcserve Unified Data Protection (UDP) is installed.
Gaps on this record
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2025-34520 · High
- CVE-2025-34521 · Medium
- Severity
- Critical9.2
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.56%
- Remediation
- Advisory link
- Affected products
- vendor Arcserve Unified Data Protection (UDP) 0 ≤7.*
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 a
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor Arcserve Unified Data Protection (UDP) 0 ≤7.*0 ≤7.*
How to fix CVE-2025-34522
No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
No version range is stored, so an installed version cannot be checked on this page.
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2025-34522. EPSS is 0.56%. Act only if a listed version of Arcserve Unified Data Protection (UDP) is installed.
Which versions are affected?
Compare what you have installed with Arcserve Unified Data Protection (UDP) 0 ≤7.* 0 ≤7.*. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.56%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Aug 27, 2025 · EUVD
Detected
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
May 15, 2026 · EUVD
Updated
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
Sources
- CVE.orgVulnerability recordCVE-2025-34522
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2025-34522
30-day exploitation probability 0.56%
first.org - EUVDVulnerability recordEUVD-2025-26165
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 overwr
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Oct 30, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- FIRST EPSSOct 24, 2026
- CVE.orgOct 21, 2026
- EUVDOct 21, 2026