CVE-2026-57202 Asterisk - Broken Access Control

Asterisk < 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk < 20.7-cert11, 22.8-cert3 contain a broken access control vulnerability caused by improper restriction of write dialplan functions via setChannelVar in ARI, letting authenticated ARI attackers with read-only privileges execute write functions including FILE() writes, exploit requires enabled and reachable HTTP web server and valid read-only ARI credentials.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.44% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Data Tampering
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Published
27 October 2026
Updated
29 October 2026
Weakness
CWE-267

Vendor fix

Update to versions 20.20.1, 21.12.3, 22.10.1, 23.4.1 or Certified Asterisk 20.7-cert11, 22.8-cert3 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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