Quick answers
- Is CVE-2026-103576 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-103576 being exploited in the wild.
- How severe is CVE-2026-103576?
- Medium severity, with a CVSS score of 6.5, published 13 October 2026.
- Which products and versions are affected?
- Microsoft Active Directory Federation Services.
- Is there a fix for CVE-2026-103576?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-103576 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2026-103576?
- Check whether you run Microsoft Active Directory Federation Services. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
An open redirect vulnerability in AD FS allows unauthenticated attackers to redirect users to attacker-controlled URLs by exploiting improper validation of redirect parameters. The vulnerability is reachable over the network and requires only that a user click a malicious link, making it suitable for phishing campaigns. The flaw enables spoofing attacks where users are deceived into visiting fraudulent authentication pages.
Affected products
- Microsoft Active Directory Federation Services
Timeline
- 2026-10-13: disclosed