---
title: "CVE-2026-57186: Asterisk - Denial of Service"
description: "Asterisk > 20 contains a denial of service caused by malformed Q.931 elements in chan_ooh323 Q.931 party-number parser, letting remote attackers crash the system, exploit requires chan_ooh323 to be compiled and publicly reachable."
url: https://panop.io/threat-heartbeat/CVE-2026-57186/
---

# CVE-2026-57186 Asterisk - Denial of Service

Asterisk > 20 contains a denial of service caused by malformed Q.931 elements in chan\_ooh323 Q.931 party-number parser, letting remote attackers crash the system, exploit requires chan\_ooh323 to be compiled and publicly reachable.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.60% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-57186)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

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

Published

27 October 2026

Updated

29 October 2026

Weakness

[CWE-839](https://cwe.mitre.org/data/definitions/839.html)

## Vendor fix

Update to Asterisk 21.12.3, 22.10.1, 23.4.1, Certified Asterisk 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

- [https://nvd.nist.gov/vuln/detail/CVE-2026-57186](https://nvd.nist.gov/vuln/detail/CVE-2026-57186)
- [https://github.com/asterisk/asterisk/commit/62a7a7037b1a145cabf95895b119cbae4d3c5a4f](https://github.com/asterisk/asterisk/commit/62a7a7037b1a145cabf95895b119cbae4d3c5a4f)
- [https://github.com/asterisk/asterisk/releases/tag/22.10.1](https://github.com/asterisk/asterisk/releases/tag/22.10.1)
- [https://github.com/asterisk/asterisk/releases/tag/23.4.1](https://github.com/asterisk/asterisk/releases/tag/23.4.1)
- [https://github.com/asterisk/asterisk/security/advisories/GHSA-h5hv-jmgj-92q2](https://github.com/asterisk/asterisk/security/advisories/GHSA-h5hv-jmgj-92q2)
- [https://github.com/asterisk/asterisk/tree/24.0.0-pre1](https://github.com/asterisk/asterisk/tree/24.0.0-pre1)
- [https://github.com/asterisk/asterisk/commit/07b9740cbc371ffa7936cf368089fd073250ea7c](https://github.com/asterisk/asterisk/commit/07b9740cbc371ffa7936cf368089fd073250ea7c)
- [https://github.com/asterisk/asterisk/releases/tag/21.12.3](https://github.com/asterisk/asterisk/releases/tag/21.12.3)
- [https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3](https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3)
- [https://github.com/asterisk/asterisk/commit/0e776a837106d5d0d14503a53388337931045164](https://github.com/asterisk/asterisk/commit/0e776a837106d5d0d14503a53388337931045164)
- [https://github.com/asterisk/asterisk/commit/42d3552d2ac0efbb68c9ec7ade898b6de0bfa033](https://github.com/asterisk/asterisk/commit/42d3552d2ac0efbb68c9ec7ade898b6de0bfa033)
- [https://github.com/asterisk/asterisk/commit/46c6c652d1de9bfbb061fab0b1f681cf60660998](https://github.com/asterisk/asterisk/commit/46c6c652d1de9bfbb061fab0b1f681cf60660998)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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