CVE-2022-36977Network attack vector

Unauthenticated code execution via untrusted deserialization

Published Mar 29, 2023 · Updated Feb 18, 2025

Deserialization in Ivanti Avalanche 6.3.2.3490 Certificate Management Server allows remote attackers to execute service-account code. The service accepts attacker-controlled serialized data without adequate validation and deserializes it into executable objects. Although the service nominally requires authentication, its authentication mechanism can be bypassed, permitting code execution with the service account's privileges.

CVSS severity9.8
Critical
EPSS probability6.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization in Ivanti Avalanche 6.3.2.3490 Certificate Management Server allows remote attackers to execute service-account code. The service accepts attacker-controlled serialized data without adequate validation and deserializes it into executable objects. Although the service nominally requires authentication, its authentication mechanism can be bypassed, permitting code execution with the service account's privileges.

The record

CVE
CVE-2022-36977
Published
Mar 29, 2023
Updated
Feb 18, 2025
Vendor
Ivanti
Product
Avalanche
Classifications
CWE-502, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 29, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 18, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=6.3.2.3490

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Ivanti · Avalancheversion=6.3.2.3490

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8Zero Day InitiativeCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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