# CERT-FR Flags XSS Flaw in Symantec EDR

Published: 2026-10-14 · Severity: routine · Sectors: technology
Canonical: https://vorant.io/reports/e7f9701f-787e-5bc4-8648-17e3e059d1bf/cert-fr-flags-xss-flaw-in-symantec-edr

> A remote cross-site scripting vulnerability in Symantec Endpoint Detection and Response before version 4.13 lets attackers inject malicious code; patch available.

CERT-FR published an advisory describing a remote indirect code injection (cross-site scripting) vulnerability affecting Symantec Endpoint Detection and Response (EDR) versions prior to 4.13. The flaw is tracked as CVE-2026-19810 and was disclosed via Symantec/Broadcom's security bulletin 38870, released October 13, 2026.

The vulnerability allows an attacker to perform a remote XSS attack against the affected product. No evidence of active exploitation in the wild is mentioned in the advisory. Defenders running Symantec EDR should consult the vendor's security bulletin for patching guidance and upgrade to version 4.13 or later to remediate the issue.

## Mentioned in this report

- Vulnerabilities: CVE-2026-19810

Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-1303

---

This is the free public brief from Vorant Threat Intelligence. When citing, attribute "Vorant" and link https://vorant.io/reports/e7f9701f-787e-5bc4-8648-17e3e059d1bf/cert-fr-flags-xss-flaw-in-symantec-edr.
In the app the same report carries its extracted indicators, its detections (Splunk SPL already written, plus Elastic and Microsoft KQL where they apply), live profiles of the actors and CVEs it names, and the vendor research on the same campaign. Slack alerts fire on the vendors, sectors and countries a reader follows. A new account starts with three days of all of it, no card: https://vorant.io/signup