Quick answers
- Is CVE-2026-3873 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-3873 being exploited in the wild.
- How severe is CVE-2026-3873?
- High severity, with a CVSS score of 7.2, published 13 March 2026.
- Which products and versions are affected?
- Avantra before 25.3.0.
- Is there a fix for CVE-2026-3873?
- 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-2026-3873 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-3873?
- Check whether you run Avantra 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.
Technical details
A vulnerability classified as CWE-798 (Use of Hard-coded Credentials) exists in Avantra versions prior to 25.3.0. The flaw stems from a legacy built-in user account (rtm) that uses static credentials, which can be leveraged by an unauthenticated attacker over the network. Successful exploitation allows the attacker to bypass intended Access Control Lists (ACLs) and access restricted system functionality. The vulnerability is addressed in version 25.3.0.
Affected products
- Avantra Avantra before 25.3.0
Timeline
- 2026-03-13: disclosed
- 2026-03-13: advisory