CVE-2026-57202
Asterisk: ARI setChannelVar bypasses live_dangerously and permits FILE() writes
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, an authenticated Asterisk REST Interface (ARI) attacker with read-only privileges may use `setChannelVar` to execute write dialplan functions, including `FILE()` writes, even when `live_dangerously` in `asterisk.conf` is set to no. The Asterisk HTTP web server must be enabled and reachable, and the attacker must already have valid `read-only ARI credentials`. HTTP is disabled by default and binds only to 127.0.0.1 by default even when enabled. 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.
INFO
Published Date :
Oct. 27, 2026, 6:17 p.m.
Last Modified :
Oct. 27, 2026, 6:17 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update Asterisk to version 20.20.1 or later.
- Update to Asterisk 21.12.3 or later.
- Update to Asterisk 22.10.1 or later.
- Update to Asterisk 23.4.1 or later.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-57202.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-57202 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-57202
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2026-57202 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-57202 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Oct. 27, 2026
Action Type Old Value New Value 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, an authenticated Asterisk REST Interface (ARI) attacker with read-only privileges may use `setChannelVar` to execute write dialplan functions, including `FILE()` writes, even when `live_dangerously` in `asterisk.conf` is set to no. The Asterisk HTTP web server must be enabled and reachable, and the attacker must already have valid `read-only ARI credentials`. HTTP is disabled by default and binds only to 127.0.0.1 by default even when enabled. 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Added CWE CWE-267 Added CWE CWE-1220 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/57xxx/CVE-2026-57202.json">CVE-2026-57202</a> Added Reference https://github.com/asterisk/asterisk/commit/8f8ccaf70a80e518147b0c35c0c252de4735446f Added Reference https://github.com/asterisk/asterisk/commit/92a5dd1003b737ae1cd2df4e60b73beb8d5e42bb Added Reference https://github.com/asterisk/asterisk/commit/ba04e7f1f98887c3c6e0dc4ddce663021f7e948a Added Reference https://github.com/asterisk/asterisk/commit/bf9354267557ef6d6b75f5304faa243f595a5a66 Added Reference https://github.com/asterisk/asterisk/commit/caa4d50d9c3bf04fc979b5b2cdc5dc425772d845 Added Reference https://github.com/asterisk/asterisk/commit/d47b0b6e5a384746db194f751b53d559aba8dba9 Added Reference https://github.com/asterisk/asterisk/commit/d8614505b27688dec3a1d14554f52fda94712928 Added Reference https://github.com/asterisk/asterisk/releases/tag/20.20.1 Added Reference https://github.com/asterisk/asterisk/releases/tag/21.12.3 Added Reference https://github.com/asterisk/asterisk/releases/tag/22.10.1 Added Reference https://github.com/asterisk/asterisk/releases/tag/23.4.1 Added Reference https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11 Added Reference https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3 Added Reference https://github.com/asterisk/asterisk/security/advisories/GHSA-vrfp-mg3q-3959 Added Reference https://github.com/asterisk/asterisk/tree/24.0.0-pre1