CVE-2025-34523

Published Aug 27, 2025

Last updated 8 months ago

CVSS critical 9.2

Overview

Description: A heap-based buffer overflow vulnerability exists in the 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.
Source: disclosure@vulncheck.com
NVD status: Analyzed
Products: udp

Risk scores

CVSS 4.0

Type: Secondary
Base score: 9.2
Impact score: -
Exploitability score: -
Vector string: 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Severity: CRITICAL

CVSS 3.1

Type: Primary
Base score: 9.8
Impact score: 5.9
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: CRITICAL

Weaknesses

disclosure@vulncheck.com: CWE-122

Hype score: Not currently trending

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:arcserve:udp:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "53D70153-E6B7-4D27-83AA-77817EBBBC3E",
            "versionEndExcluding": "7.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:arcserve:udp:*:*:*:*:*:*:*:*",
            "matchCriteriaId": "7644D867-3950-4EBF-9CBE-644458C26801",
            "versionEndExcluding": "10.2",
            "versionStartIncluding": "8.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:arcserve:udp:7.0:-:*:*:*:*:*:*",
            "matchCriteriaId": "1CAB17ED-9FBC-475F-8206-3BC8E672C719",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:arcserve:udp:7.0:update_1:*:*:*:*:*:*",
            "matchCriteriaId": "8672F05B-B0FC-4A81-8D5B-2A7DE8C6D92D",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:arcserve:udp:7.0:update_2:*:*:*:*:*:*",
            "matchCriteriaId": "1379C0DE-8BB0-47FF-AE56-6E54F125E5A0",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.

Overview

Risk scores

CVSS 4.0

CVSS 3.1

Weaknesses

Social media

Configurations

Related CVEs

References