CVE-2026-57203: Asterisk: Local privilege escalation through ast_loggrabber's world-writable helper location

Medium severity · published Oct 27, 2026

CVE-2026-57203

Asterisk: Local privilege escalation through ast_loggrabber's world-writable helper location

New

6.9

CVSS

0.1%

EPSS

On KEV

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, `ast_loggrabber` executes a `Python script` from the world-writable `/tmp` directory. An attacker already authorized to open a shell session on the Asterisk server may place a malicious script there and gain elevated privileges or execute code when an administrator runs `ast_loggrabber` as a user with elevated privileges. 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.

Exploitation

Is it being used?

Exploit prediction (EPSS)0.1% · higher than 4% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

asterisk · asterisk

< 20.20.1; >= 21.0.0-pre1, < 21.12.3; >= 22.0.0-pre1, < 22.10.1; >= 23.0.0-pre1, < 23.4.1 · source: vendor

certified-asterisk · asterisk

< 20.7-cert11; >= 22.8-cert1-pre1, < 22.8-cert3 · source: vendor