What is CVE-2021-35222?

CVE-2021-35222 is a high-severity vulnerability in Microsoft Windows, classified under Cross-site Scripting. CVSS score: 8.0/10. Published 2021-08-31.

How severe is CVE-2021-35222?

High severity. CVSS v3 base score is 8.0 out of 10.

XSS in Microsoft Windows

CVE-2021-35222

This vulnerability allows attackers to impersonate users and perform arbitrary actions leading to a Remote Code Execution (RCE) from the Alerts Settings page.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-08-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:L.

EPSS exploit prediction

EPSS: 0.026 (84.8th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000

Affected products

Microsoft Windows
Solarwinds Orion Platform — versions 2020.2.6 and previous versions
Solarwinds Orion Platform

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

documentation.solarwinds.com/en/success_center/orionplatform/content/core-secur… (Vendor Advisory)
support.solarwinds.com/SuccessCenter/s/article/Orion-Platform-2020-2-6-Hotfix-1 (Patch, Vendor Advisory)
www.solarwinds.com/trust-center/security-advisories/cve-2021-35222 (Vendor Advisory)
support.solarwinds.com/SuccessCenter/s/article/Mitigate-the-Resource-aspx-Refle… (Patch, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2021-35222?: CVE-2021-35222 is a high-severity vulnerability in Microsoft Windows, classified under Cross-site Scripting. CVSS score: 8.0/10. Published 2021-08-31.
How severe is CVE-2021-35222?: High severity. CVSS v3 base score is 8.0 out of 10.