All vulnerabilities
CVE-2026-57188GHSA-mxgm-8c6f-5p8f

Asterisk: Stack buffer overflow in res_xmpp XMPP namespace prefix handling

asterisk asterisk
Open in ThreatlineRecord JSON
CVSS
7.1High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)No scoreNo FIRST EPSS score in this snapshot yet
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published27 Oct 2026Updated 27 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

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 attacker may cause a stack buffer overflow in res_xmpp XMPP namespace prefix handling using carefully crafted packets. The res_xmpp module must be loaded, an XMPP connection must be configured in xmpp.conf, and the attacker must have an XMPP account on the same or a federated server. 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.

Text from CVE List

Affected versions 6

  • asteriskaffected: < 20.20.1CVE List
  • asteriskaffected: >= 21.0.0-pre1, < 21.12.3CVE List
  • asteriskaffected: >= 22.0.0-pre1, < 22.10.1CVE List
  • asteriskaffected: >= 23.0.0-pre1, < 23.4.1CVE List
  • certified-asteriskaffected: < 20.7-cert11CVE List
  • certified-asteriskaffected: >= 22.8-cert1-pre1, < 22.8-cert3CVE List

References 15