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CVE-2026-57194

5.9 medium Awaiting Analysis
NVD · CVE.org

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.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 4

  1. StatusPublished → Awaiting AnalysisNVD modified 2026-10-28 14:18
  2. StatusReceived → PublishedNVD modified 2026-10-27 16:52
  3. StatusPublished → ReceivedNVD modified 2026-10-27 17:17
  4. First seenCVSS 5.9 · asteriskNVD modified 2026-10-27 16:52

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 15