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TI-2021-18635 Aliases CVE-2021-42127GHSA-5cxv-f998-83v8

Deserialization of untrusted data in Ivanti Avalanche

Priority HIGH 78CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
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-502.

Summary

A deserialization of untrusted data vulnerability exists in Ivanti Avalanche before 6.3.3 using Inforail Service allows arbitrary code execution via Data Repository Service.

Why it matters now

EPSS 0.65833 99th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Ivanti Avalanche6.3.3—No fix listedCNA
  • Ivanti Avalanche Vendor— Affected 6.3.3 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:ivanti:avalanche:*:*:*:*:*:*:*:*before 6.3.3VulnerableIvanti
  • cpe:2.3:a:ivanti:avalanche:*:*:*:*:*:*:*:* Versions before 6.3.3 Vulnerable ·Ivanti

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-42127
  2. 2026-10-03 Alias added: GHSA-5cxv-f998-83v8

References

Advisory 1

  • TI-2022-17179 Deserialization of untrusted data in Ivanti Avalanche CVSS 3.1CRITICAL 9.8
  • TI-2023-15842 Improper input validation in Ivanti Avalanche CVSS 3.1CRITICAL 9.8
  • TI-2023-24891 Unrestricted file upload in Ivanti Avalanche CVSS 3.1CRITICAL 9.8
  • TI-2023-15845 An unauthenticated attacker could achieve the code execution through a RemoteControl server. CVSS 3.1CRITICAL 9.8
  • TI-2022-17186 Path traversal in Ivanti Avalanche CVSS 3.1CRITICAL 9.8
  • TI-2023-24890 Unrestricted file upload in Ivanti Avalanche CVSS 3.1CRITICAL 9.8
See all 116 →

Sources

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