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TI-2023-11421 Aliases CVE-2023-26258GHSA-wvxg-vj6j-j677

Arcserve UDP through 9.0.6034 allows authentication bypass.

Priority HIGH 82CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-863.

Summary

Arcserve UDP through 9.0.6034 allows authentication bypass. The method getVersionInfo at WebServiceImpl/services/FlashServiceImpl leaks the AuthUUID token. This token can be used at /WebServiceImpl/services/VirtualStandbyServiceImpl to obtain a valid session. This session can be used to execute any task as administrator.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.40035 98th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:arcserve:udp:*:*:*:*:*:*:*:*up to 9.0.6034VulnerableArcserve
  • cpe:2.3:a:arcserve:udp:*:*:*:*:*:*:*:* Versions up to 9.0.6034 Vulnerable ·Arcserve

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-26258
  2. 2026-10-03 Alias added: GHSA-wvxg-vj6j-j677

References

Exploit 1

Other 2

  • TI-2015-03429 Directory traversal vulnerability in Arcserve UDP before 5.0 Update 4 allows remote… KEVCVSS 3.1CRITICAL 9.1
  • TI-2024-00736 Authentication Bypass via wizardLogin in Arcserve Unified Data Protection CVSS 3.1CRITICAL 9.8
  • TI-2024-00737 Authentication Bypass via wizardLogin in Arcserve Unified Data Protection CVSS 3.1HIGH 8.8
  • TI-2024-00738 Unauthenticated DoS in Arcserve Unified Data Protection CVSS 3.1HIGH 7.5
  • TI-2023-22379 Arcserve UDP Unauthenticated RCE CVSS 3.1CRITICAL 9.8
  • TI-2023-22381 Arcserve UDP Agent Unauthenticated Path Traversal File Upload CVSS 3.1CRITICAL 9.8
See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences