Quick answers
- Is CVE-2025-59709 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2025-59709 being exploited in the wild.
- How severe is CVE-2025-59709?
- Medium severity, with a CVSS score of 6.8, published 3 April 2026.
- Which products and versions are affected?
- Kovai.co BizTalk360 < 11.6.3963.2611.
- Is there a fix for CVE-2025-59709?
- A patch was published on 2025-10-31: Initial insufficient fix in version 11.6 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2025-59709 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2025-59709?
- Check whether you run Kovai Biztalk360. 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
A directory traversal vulnerability exists in BizTalk360 versions prior to 11.6.3963.2611. The issue stems from the mishandling of user-provided input in paths used by the server to read files. An attacker with 'Super User' or administrative privileges can exploit this to access files outside of the intended web directory or coerce the service into performing NTLM authentication against an attacker-controlled listener. While the NVD classifies this as requiring high privileges (PR:H), related research indicates that insufficient access controls on WCF services in the same product suite may allow broader exploitation. The vulnerability was fully addressed in version 11.6.3963.2611 after an initial fix in version 11.6 was found to be bypassable.
Affected products
- Kovai.co BizTalk360 < 11.6.3963.2611
Timeline
- 2025-06-27: other: First contact with vendor
- 2025-10-31: patched: Initial insufficient fix in version 11.6
- 2025-12-03: patched: Final fix in version 11.6.3963.2611
- 2026-04-03: disclosed: Public advisory release