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CVE-2026-23741— ast_coredumper running as root sources ast_debug_tools.conf from /etc/asterisk; potentially leading to privilege escalation

Quick assessment

Affected
asterisk asterisk
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Asterisk是Asterisk开源的一款PBX系统的软件，运行在Linux系统上，支持使用SIP、IAX、H323协议进行IP通话。 Asterisk 20.7-cert9之前版本、20.18.2之前版本、21.12.1之前版本、22.8.2之前版本和23.2.2之前版本存在代码问题漏洞，该漏洞源于ast_coredumper脚本加载可被修改的配置文件，可能导致执行任意bash代码。

EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-23741

Vulnerability Information
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Vulnerability Title
ast_coredumper running as root sources ast_debug_tools.conf from /etc/asterisk; potentially leading to privilege escalation
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对搜索路径元素未加控制
Source: CVE Program / CVE List V5
Vulnerability Title
Asterisk 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Asterisk是Asterisk开源的一款PBX系统的软件，运行在Linux系统上，支持使用SIP、IAX、H323协议进行IP通话。 Asterisk 20.7-cert9之前版本、20.18.2之前版本、21.12.1之前版本、22.8.2之前版本和23.2.2之前版本存在代码问题漏洞，该漏洞源于ast_coredumper脚本加载可被修改的配置文件，可能导致执行任意bash代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
asterisk asterisk < 23.2.2 -

II. Public POCs for CVE-2026-23741

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III. Intelligence Information for CVE-2026-23741

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Same Patch Batch · asterisk · 2026-02-06 · 4 CVEs total

CVE-2026-23738 3.5 LOW The Asterisk embedded web server 's /httpstatus page echos user supplied values(cookie and
CVE-2026-23739 2.0 LOW Asterisk xml.c uses unsafe XML_PARSE_NOENT leading to potential XXE Injection
CVE-2026-23740 Asterisk vulnerable to potential privilege escalation

IV. Related Vulnerabilities

Same product: asterisk
Same vendor: asterisk
Same weakness: CWE-427

V. Comments for CVE-2026-23741

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