CVE-2026-8403 Stored XSS in Exagate's SYSGUARD 6001
Stored XSS in SYSGUARD 6001 allows attackers to inject scripts, potentially leading to session hijacking or malicious actions on the device.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-8403?
CVE-2026-8403 is a medium-severity cross-site scripting vulnerability in Eksagate Electronic Engineering and Computer Industry Trade Inc. SYSGUARD 6001, published on 30 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Eksagate Electronic Engineering and Computer Industry Trade Inc. SYSGUARD 6001 allows Stored XSS.
This issue affects SYSGUARD 6001: from 2.0.2 before 6.1.4.0.
NOTE: The vendor was contacted and it was learned that the product is not supported.
Weakness: CWE-79
Which versions are affected by CVE-2026-8403?
How do I fix CVE-2026-8403?
No fix has been published for CVE-2026-8403 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-8403 being exploited?
There is no known exploitation of CVE-2026-8403 in the wild and no public exploit code.
Sources
Also known as GHSA-5gw8-w8f7-pfc3.