CVE-2026-57202 Asterisk: ARI setChannelVar bypasses live_dangerously and permits FILE() writes
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-57202?
CVE-2026-57202 is a high-severity vulnerability in asterisk, published on 27 Oct 2026.
Official 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.
Which versions are affected by CVE-2026-57202?
How do I fix CVE-2026-57202?
Upgrade to a fixed version.
Is CVE-2026-57202 being exploited?
There is no known exploitation of CVE-2026-57202 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-57202, GHSA-vrfp-mg3q-3959, UBUNTU-CVE-2026-57202.