CVE-2024-28988Network attack vector

Unauthenticated code execution via AjaxProxy deserialization

Published Sep 1, 2025 · Updated Sep 1, 2025

Java deserialization in SolarWinds Web Help Desk 12.8.3 HF 2 and earlier allows remote attackers to execute arbitrary code via AjaxProxy. AjaxProxy fails to validate user-supplied data before Java deserialization, allowing attacker-controlled objects to reach the deserializer. No authentication or user interaction is required, and successful exploitation executes code as SYSTEM with full host impact.

CVSS severity9.8
Critical
EPSS probability39.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Java deserialization in SolarWinds Web Help Desk 12.8.3 HF 2 and earlier allows remote attackers to execute arbitrary code via AjaxProxy. AjaxProxy fails to validate user-supplied data before Java deserialization, allowing attacker-controlled objects to reach the deserializer. No authentication or user interaction is required, and successful exploitation executes code as SYSTEM with full host impact.

The record

CVE
CVE-2024-28988
Published
Sep 1, 2025
Updated
Sep 1, 2025
Vendor
SolarWinds
Product
Web Help Desk
Classifications
CWE-502, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 1, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=12.8.3 HF 2 and previous versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SolarWinds · Web Help Deskversion=12.8.3 HF 2 and previous versions

Published CVSS scores

9.8SolarWindsCVSS:3.1/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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