Quick answers
- Is CVE-2026-124700 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-124700 being exploited in the wild.
- How severe is CVE-2026-124700?
- High severity, with a CVSS score of 7.8, published 12 November 2026.
- Which products and versions are affected?
- Progress Telerik UI for WinForms prior to 2026.4.1111.
- Is there a fix for CVE-2026-124700?
- Yes: fixed in 2026.4.1111. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-124700 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-124700?
- Check whether you run Progress Telerik UI for WinForms at an affected version. 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.
How to fix
- Fixed in: 2026.4.1111
Technical details
An untrusted URL redirection vulnerability (CWE-601) in Telerik UI for WinForms versions prior to 2026.4.1111 allows attackers to craft documents with hyperlinks using non-allowlisted URI schemes that, when opened by a user, execute arbitrary operating system protocol handlers with attacker-supplied arguments. The attack requires user interaction to open a malicious document.
Affected products
- Progress Telerik UI for WinForms prior to 2026.4.1111
Timeline
- 2026-11-12: disclosed