# CVE-2026-28323 — SolarWinds Web Help Desk

> As of 2026-07-31, CVE-2026-28323 is a CRITICAL-severity vulnerability in SolarWinds Web Help Desk, CVSS v3.1 9.8, EPSS 0.6% (47.0th percentile). Threadlinqs Intelligence links 2 tracked threat campaigns to CVE-2026-28323, most recently “SolarWinds Access Rights Manager Hard-Coded Cryptographic Key (CVE-2026-28326) Enables Unauthenticated RCE”.

**Last updated:** 2026-07-31

## What is CVE-2026-28323?

SolarWinds Web Help Desk is found to be affected by a SAML authentication bypass vulnerability. This requires the SAML 2.0 authentication method to be enabled.

The record classifies CVE-2026-28323 under weakness class [CWE-287](https://intel.threadlinqs.com/cwe/CWE-287). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 67 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 9.8 — CRITICAL (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **EPSS (FIRST):** 0.6% probability of exploitation in the next 30 days, higher than 47.0% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 6.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-07-30, last modified 2026-07-31

## Is CVE-2026-28323 being exploited?

No public exploitation evidence for CVE-2026-28323 is recorded in the sources Threadlinqs tracks — CISA KEV, Exploit-DB, public proof-of-concept repositories and ProjectDiscovery Nuclei — as of 2026-07-31. That is an absence of evidence in those feeds, not a guarantee that the vulnerability is unexploited.

## Affected products and versions

- [SolarWinds](https://intel.threadlinqs.com/vendors/solarwinds): Web Help Desk

## How to fix CVE-2026-28323

No vendor patch reference has been recorded for CVE-2026-28323 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-28323

2 tracked threats in the Threadlinqs corpus reference CVE-2026-28323, either in the campaign’s CVE list or as an indicator on the campaign record.

- [SolarWinds Access Rights Manager Hard-Coded Cryptographic Key (CVE-2026-28326) Enables Unauthenticated RCE](https://intel.threadlinqs.com/threat/TL-2026-2585) — CRITICAL · 2026-09-19
- [CVE-2026-28323: SolarWinds Web Help Desk SAML Authentication Bypass](https://intel.threadlinqs.com/threat/TL-2026-1789) — CRITICAL · 2026-07-31

## Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-08-01. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [solarwinds.com — vendor advisory](https://www.solarwinds.com/trust-center/security-advisories/CVE-2026-28323)
- [documentation.solarwinds.com — release notes](https://documentation.solarwinds.com/en/success_center/whd/content/release_notes/whd_2026-2-1_release_notes.htm)

**Other references**

- [documentation.solarwinds.com — x secure configuration guide](https://documentation.solarwinds.com/en/success_center/whd/content/helpdesksecureconfiguration.htm)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-28323
Full detection coverage and IOCs for threats exploiting CVE-2026-28323 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp