CVE-2025-49832

Asterisk is an open source private branch exchange and telephony toolkit. In versions up to and including 18.26.2, between 20.00.0 and 20.15.0, 20.7-cert6, 21.00.0, 22.00.0 through 22.5.0, there is a remote DoS and possible RCE condition in `asterisk/res/res_stir_shaken /verification.c` that can be exploited when an attacker can set an arbitrary Identity header, or STIR/SHAKEN is enabled, with verification set in the SIP profile associated with the endpoint to be attacked. This is fixed in versions 18.26.3, 20.7-cert6, 20.15.1, 21.10.1 and 22.5.1.

CVSS v3.1

6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1

6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.46% chance of exploitation in the next 30 days, 38th percentile

Published

2025-08-01

Proof-of-concept exploits (1)

• asterisk/asterisk/security/advisories/GHSA-mrq5-74j5-f5cr

References

• CVE Record
• NVD entry

Related

• CVE-2024-35190
• CVE-2024-42365
• CVE-2025-47779
• CVE-2025-47780
• CVE-2025-54995
• CVE-2025-49825