Asterisk CVE-2026-23741

NONE

Uncontrolled Search Path Element (CWE-427)

2026-02-06 security-advisories@github.com

Industrial Asterisk Certified Asterisk Sangoma

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Vulnerability Assessment

Weakness	CWE CWE-427
Impact	Attack vector: Local. Complexity: Low. Privileges required: None. User interaction: Required.
Exploit ScenarioDerived	An attacker could exploit this vulnerability to compromise the affected system.

Awaiting Data No severity or threat signals available yet. Label will update when CVSS score is published or threat intelligence arrives.

No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

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Affects your stack

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Technical ContextAI · show details

Classified as CWE-427 (Uncontrolled Search Path Element). Affects Asterisk. Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, the asterisk/contrib/scripts/ast_coredumper runs as root, as noted by the NOTES tag on line 689 of the ast_coredumper file. The script will source the contents of /etc/asterisk/ast_debug_tools.conf, which resides in a folder that is writeable by the asterisk user:group. Due to the /etc/asterisk/ast_debug_tools.conf file following bash semantics and it bein

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

GitHub Advisory 0.0 LOW

AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:N

CVSS VectorGitHub Advisory

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

None

Integrity

None

Availability

None

DescriptionGitHub Advisory

Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, the asterisk/contrib/scripts/ast_coredumper runs as root, as noted by the NOTES tag on line 689 of the ast_coredumper file. The script will source the contents of /etc/asterisk/ast_debug_tools.conf, which resides in a folder that is writeable by the asterisk user:group. Due to the /etc/asterisk/ast_debug_tools.conf file following bash semantics and it being loaded; an attacker with write permissions may add or modify the file such that when the root ast_coredumper is run; it would source and thereby execute arbitrary bash code found in the /etc/asterisk/ast_debug_tools.conf. This issue has been patched in versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2.

Threat Intelligence Overview

EPSS Score

0.0%

Top 85% exploitable

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS

GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity NONE

CISA KEV No

Public POC No

EPSS 0.0%

Patch available No

Active threat No

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

Awaiting Data No severity or threat signals available yet. Label will update when CVSS score is published or threat intelligence arrives.

SSVC AssessmentENISA

SSVC Decision· derived

Defer

Exploitation· derived

None

System Exposure· derived

Small

Automatable· derived

Human Impact· derived

Medium

Affected Products (CPE)GitHub Advisory

cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*

cpe:2.3:a:sangoma:certified_asterisk:*:*:*:*:*:*:*:*

cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1:*:*:*:*:*:*

cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1-rc1:*:*:*:*:*:*

cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1-rc2:*:*:*:*:*:*

cpe:2.3:a:sangoma:certified_asterisk:20.7:cert2:*:*:*:*:*:*

cpe:2.3:a:sangoma:certified_asterisk:20.7:cert3:*:*:*:*:*:*

cpe:2.3:a:sangoma:certified_asterisk:20.7:cert4:*:*:*:*:*:*

cpe:2.3:a:sangoma:certified_asterisk:20.7:cert5:*:*:*:*:*:*

cpe:2.3:a:sangoma:certified_asterisk:20.7:cert6:*:*:*:*:*:*

cpe:2.3:a:sangoma:certified_asterisk:20.7:cert7:*:*:*:*:*:*

cpe:2.3:a:sangoma:certified_asterisk:20.7:cert8:*:*:*:*:*:*

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Same weakness CWE-427 – Uncontrolled Search Path Element

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References

Advisories & patches

ADVISORY https://github.com/asterisk/asterisk/security/advisories/GHSA-rvch-3jmx-3jf3

Search Externally

GitHub PoC

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