---
id: CVE-2026-57203
title: >-
  Asterisk: Local privilege escalation through ast_loggrabber's world-writable
  helper location
summary: >-
  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-writ…
severity: medium
cvss: 6.9
cvssVector: 'CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N'
cvssSource: cna
cwe:
  - CWE-426
vendor: asterisk
product: asterisk
affected:
  - asterisk < 20.20.1
  - 'asterisk >= 21.0.0-pre1, < 21.12.3'
  - 'asterisk >= 22.0.0-pre1, < 22.10.1'
  - 'asterisk >= 23.0.0-pre1, < 23.4.1'
  - certified-asterisk < 20.7-cert11
  - 'certified-asterisk >= 22.8-cert1-pre1, < 22.8-cert3'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-29T18:21:40.577736Z'
published: '2026-10-27'
updated: '2026-10-29'
sourceUpdated: '2026-10-29T18:22:00.568Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-57203'
references:
  - url: >-
      https://github.com/asterisk/asterisk/security/advisories/GHSA-xgj6-2gc5-5x9c
    label: >-
      https://github.com/asterisk/asterisk/security/advisories/GHSA-xgj6-2gc5-5x9c
  - url: >-
      https://github.com/asterisk/asterisk/commit/022407ec47adebe27b7ec8bcf5626e5a02fe1551
    label: >-
      https://github.com/asterisk/asterisk/commit/022407ec47adebe27b7ec8bcf5626e5a02fe1551
  - url: >-
      https://github.com/asterisk/asterisk/commit/a51c4e3d6bccce4bc4226c43e78952573a62f165
    label: >-
      https://github.com/asterisk/asterisk/commit/a51c4e3d6bccce4bc4226c43e78952573a62f165
  - url: >-
      https://github.com/asterisk/asterisk/commit/ba8e5bdecd5280fc0ab230df59e41ea21b3a052f
    label: >-
      https://github.com/asterisk/asterisk/commit/ba8e5bdecd5280fc0ab230df59e41ea21b3a052f
  - url: >-
      https://github.com/asterisk/asterisk/commit/bd63fe121d0e86867863bd98b5771e592273b035
    label: >-
      https://github.com/asterisk/asterisk/commit/bd63fe121d0e86867863bd98b5771e592273b035
  - url: >-
      https://github.com/asterisk/asterisk/commit/c0fc2ae54cb6289a48a80333432f5fdf5a40c7de
    label: >-
      https://github.com/asterisk/asterisk/commit/c0fc2ae54cb6289a48a80333432f5fdf5a40c7de
  - url: >-
      https://github.com/asterisk/asterisk/commit/f18ac4c964781f671e400342790bf40679698067
    label: >-
      https://github.com/asterisk/asterisk/commit/f18ac4c964781f671e400342790bf40679698067
  - url: 'https://github.com/asterisk/asterisk/releases/tag/20.20.1'
    label: 'https://github.com/asterisk/asterisk/releases/tag/20.20.1'
  - url: 'https://github.com/asterisk/asterisk/releases/tag/21.12.3'
    label: 'https://github.com/asterisk/asterisk/releases/tag/21.12.3'
  - url: 'https://github.com/asterisk/asterisk/releases/tag/22.10.1'
    label: 'https://github.com/asterisk/asterisk/releases/tag/22.10.1'
  - url: 'https://github.com/asterisk/asterisk/releases/tag/23.4.1'
    label: 'https://github.com/asterisk/asterisk/releases/tag/23.4.1'
  - url: 'https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11'
    label: 'https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11'
  - url: 'https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3'
    label: 'https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3'
  - url: 'https://github.com/asterisk/asterisk/tree/24.0.0-pre1'
    label: 'https://github.com/asterisk/asterisk/tree/24.0.0-pre1'
tags:
  - cve.org
epss: 0.00145
epssPercentile: 0.03769
ingestedAt: '2026-10-27T21:58:08.743Z'
---

## Overview

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.

## Affected

- `asterisk < 20.20.1`
- `asterisk >= 21.0.0-pre1, < 21.12.3`
- `asterisk >= 22.0.0-pre1, < 22.10.1`
- `asterisk >= 23.0.0-pre1, < 23.4.1`
- `certified-asterisk < 20.7-cert11`
- `certified-asterisk >= 22.8-cert1-pre1, < 22.8-cert3`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.