CVE-2026-57194
Asterisk is an open source private branch exchange and telephony toolkit. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, an out-of-bounds write in `chan_unistim` `DIALPAGE` digit handling can overflow the `phone_number` field and crash Asterisk when an attacker sends a carefully crafted incoming request packet. The `chan_unistim` module must be loaded and configured with a valid `UNISTIM UDP port` that the attacker can reach. The attacker must register as a configured `phone MAC`, or the deployment must have an equivalent `production/autoprovisioning` path that allows the client to reach the main page. This issue is fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3.
Properties
- Severity
- MEDIUM
- Nvd fetched at
- 2026-10-27T19:32:16.133732+00:00
- Cvss score
- 5.9
- Cvss severity
- MEDIUM
- Retrieved at
- 2026-10-27T19:33:27+00:00
- Score
- 5.9
- Last source
- NVD
- Cvss version
- 3.1
- Cve id
- CVE-2026-57194
- Cvss vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- First seen by Signal
- 2026-10-27T19:33:27+00:00
- Vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published at
- 2026-10-27T17:17:01.620
- Last modified
- 2026-10-27T17:17:01.620
Related Entities (1)
HAS_WEAKNESS (1)
Explore deeper with Ninja Signal's threat intelligence graph