Description
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, `app_sms.c` copies externally controlled `SMS` lengths into `fixed in-struct buffers` without sufficient bounds checks, allowing an attacker to corrupt memory or crash Asterisk. The administrator must explicitly use the `SMS` dialplan application, which is useful when routing calls to or from `analog devices`, and must not have ensured that data passed to the application is valid. 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.
Published: 2026-10-27
Score: 2.3 Low
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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History

Tue, 03 Nov 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 02 Nov 2026 12:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-120
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Wed, 28 Oct 2026 00:00:00 +0000

Type Values Removed Values Added
First Time appeared Asterisk
Asterisk asterisk
Asterisk certified Asterisk
Vendors & Products Asterisk
Asterisk asterisk
Asterisk certified Asterisk

Tue, 27 Oct 2026 22:00:00 +0000

Type Values Removed Values Added
Description 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, `app_sms.c` copies externally controlled `SMS` lengths into `fixed in-struct buffers` without sufficient bounds checks, allowing an attacker to corrupt memory or crash Asterisk. The administrator must explicitly use the `SMS` dialplan application, which is useful when routing calls to or from `analog devices`, and must not have ensured that data passed to the application is valid. 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.
Title Asterisk: Asterisk app_sms.c copies externally controlled SMS lengths into fixed in-struct buffers
Weaknesses CWE-787
References
Metrics cvssV4_0

{'score': 2.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'}

Subscriptions

Asterisk Asterisk Certified Asterisk
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-11-03T13:58:43.338Z

Reserved: 2026-06-24T02:00:46.800Z

Link: CVE-2026-57199

cve-icon Vulnrichment

Updated: 2026-11-03T13:57:37.938Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-10-27T22:17:27.723

Modified: 2026-11-03T14:17:36.467

Link: CVE-2026-57199

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-27T21:52:42Z

Links: CVE-2026-57199 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-11-02T14:00:08Z

Weaknesses