CVE-2020-35776

6.5 mediumEPSS 4.1%

Medium (6.5) in digium asterisk. EPSS 4.1% chance of exploitation in the next 30 days.

A buffer overflow in res_pjsip_diversion.c in Sangoma Asterisk versions 13.38.1, 16.15.1, 17.9.1, and 18.1.1 allows remote attacker to crash Asterisk by deliberately misusing SIP 181 responses.

Severity

CVSS 3.1

6.5 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS: 4.1% chance of exploitation in the next 30 days; higher than 90% of CVEs (scores of 2026-10-31)
CWE: CWE-120
Published: 2021-02-18
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

digium:asterisk

References

http://packetstormsecurity.com/files/161470/Asterisk-Project-Security-Advisory-AST-2021-001.html
http://seclists.org/fulldisclosure/2021/Feb/57
https://downloads.asterisk.org/pub/security/AST-2021-001.html
https://issues.asterisk.org/
https://issues.asterisk.org/jira/browse/ASTERISK-29227

Check your stack JSON