CVE-2026-28299Network attack vector

Service crash via unauthenticated arbitrary file uploads

Published Jun 2, 2026 · Updated Jun 2, 2026

Unrestricted file upload in SolarWinds Web Help Desk 2026.1 and earlier allows remote attackers to crash the server without authentication. The file-upload path accepts arbitrary files without authentication or storage limits, allowing repeated submissions to exhaust the application volume. The attack is network-reachable and requires no user interaction; exhaustion of the hosting volume interrupts the Web Help Desk service.

CVSS severity8.2
High
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in SolarWinds Web Help Desk 2026.1 and earlier allows remote attackers to crash the server without authentication. The file-upload path accepts arbitrary files without authentication or storage limits, allowing repeated submissions to exhaust the application volume. The attack is network-reachable and requires no user interaction; exhaustion of the hosting volume interrupts the Web Help Desk service.

The record

CVE
CVE-2026-28299
Published
Jun 2, 2026
Updated
Jun 2, 2026
Vendor
SolarWinds
Product
Web Help Desk
Classifications
CWE-770, CAPEC-130, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 2, 2026Record 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=2026.1 and all previous versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SolarWinds · Web Help Deskversion=2026.1 and all previous versions

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.2SolarWindsCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
CAPEC-130Excessive Allocation
T1499.003Application Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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