Avalanche
CVE-2021-42130
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A08:2025 - Software or Data Integrity Failures
ASVS 5.0
V1 - Encoding and Sanitization Safe deserialization, type allowlists
MITRE ATT&CK
2 techniques across 2 tactics: Execution, Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 8.8 (HIGH). Attack characteristics: network attack vector, low complexity, low privileges required, no user interaction not required. |
| Exploit ScenarioDerived | A remote attacker could execute arbitrary code through malicious serialized objects by sending crafted requests to the affected application. |
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Alert meAnalysisAI
A deserialization of untrusted data vulnerability exists in Ivanti Avalanche before 6.3.3 allows an attacker with access to the Inforail Service to perform arbitrary code execution. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Avoid deserializing untrusted data. Use safe serialization formats (JSON). Implement integrity checks and type allowlists.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Deserialization of Untrusted Data (CWE-502), which allows attackers to execute arbitrary code through malicious serialized objects. A deserialization of untrusted data vulnerability exists in Ivanti Avalanche before 6.3.3 allows an attacker with access to the Inforail Service to perform arbitrary code execution. Affected products include: Ivanti Avalanche. Version information: before 6.3.3.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
A deserialization of untrusted data vulnerability exists in Ivanti Avalanche before 6.3.3 allows an attacker with access to the Inforail Service to perform arbitrary code execution.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Insecure deserialization occurs when an application converts serialized data (a stream of bytes representing an object's state) back into a living object without proper validation.
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
Affected Products (CPE)NVD
An attacker can send a specially crafted message to the Wavelink Avalanche Manager, which could result in service disrup
An unrestricted upload of file with dangerous type vulnerability exists in Avalanche versions 6.3.x and below that could
An unauthenticated attacker could achieve the code execution through a RemoteControl server. Rated critical severity (CV
XXE in SmartDeviceServer in Ivanti Avalanche 6.3.1 allows a remote unauthenticated attacker to read arbitrary files on t
CVE-2023-38036 is a critical unauthenticated buffer overflow vulnerability in Ivanti Avalanche Manager prior to version
Path Traversal in Ivanti Avalanche before version 6.4.5 allows a remote unauthenticated attacker to bypass authenticatio
Path Traversal in Ivanti Avalanche before version 6.4.5 allows a remote unauthenticated attacker to bypass authenticatio
A Heap Overflow vulnerability in WLAvalancheService component of Ivanti Avalanche before 6.4.3 allows a remote unauthent
A Heap overflow vulnerability in WLInfoRailService component of Ivanti Avalanche before 6.4.3 allows an unauthenticated
A Heap Overflow vulnerability in WLInfoRailService component of Ivanti Avalanche before 6.4.3 allows a remote unauthenti
An unauthenticated could abuse a XXE vulnerability in the Smart Device Server to leak data or perform a Server-Side Requ
An unrestricted upload of file with dangerous type vulnerability exists in Avalanche versions 6.4.1 and below that could
GitHub PoC
Exploit-DB