Quick answers
- Is CVE-2026-77807 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-77807 being exploited in the wild.
- How severe is CVE-2026-77807?
- High severity, with a CVSS score of 7.5, published 11 September 2026.
- Which products and versions are affected?
- Acyba AcyMailing up to 11.0.4.
- Is there a fix for CVE-2026-77807?
- 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-2026-77807 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-77807?
- Check whether you run Acyba AcyMailing 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
The vulnerability is a directory traversal (path traversal) flaw in the `user[name]` parameter affecting AcyMailing versions up to 11.0.4. The vulnerability allows unauthenticated attackers to request arbitrary file paths on the server. The attack vector is network-based and requires only that the "Embed images" option be enabled in the plugin's configuration; no authentication is required. An attacker can read arbitrary files from the server, potentially accessing configuration files containing database credentials or other sensitive data. A patch addressing this issue is available in versions after 11.0.4.
Affected products
- Acyba AcyMailing up to 11.0.4
Timeline
- 2026-09-11: disclosed