Is CVE-2026-57185 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-57185 being exploited in the wild.

How severe is CVE-2026-57185?

Medium severity, with a CVSS score of 6.5, published 27 October 2026.

Which products and versions are affected?

Asterisk Project Asterisk before 20.20.1, 21.12.3, 22.10.1, 23.4.1; Asterisk Project Certified Asterisk before 20.7-cert11, 22.8-cert3.

Is there a fix for CVE-2026-57185?

Yes: fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1; Certified Asterisk 20.7-cert11, 22.8-cert3. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-57185 attacked?

It is attacked over the network.

Am I affected by CVE-2026-57185?

Check whether you run Asterisk Project Asterisk or Asterisk Project Certified Asterisk at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-57185: Asterisk buffer over-read in PJSIP MWI parser

CVE-2026-57185 · Severity: medium · CVSS 6.5 · Published 2026-10-27

Asterisk is an open-source phone system server used by organizations to manage voice communications. An authenticated attacker can crash the Asterisk server by sending a specially crafted SIP message, causing a denial of service. The attacker must first pass SIP authentication with valid credentials or a matching source IP address.

Technologies: Asterisk Project Asterisk, Asterisk Project Certified Asterisk. Vendors: Asterisk Project.

Quick answers

Is CVE-2026-57185 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-57185 being exploited in the wild.
How severe is CVE-2026-57185?: Medium severity, with a CVSS score of 6.5, published 27 October 2026.
Which products and versions are affected?: Asterisk Project Asterisk before 20.20.1, 21.12.3, 22.10.1, 23.4.1; Asterisk Project Certified Asterisk before 20.7-cert11, 22.8-cert3.
Is there a fix for CVE-2026-57185?: Yes: fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1; Certified Asterisk 20.7-cert11, 22.8-cert3. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-57185 attacked?: It is attacked over the network.
Am I affected by CVE-2026-57185?: Check whether you run Asterisk Project Asterisk or Asterisk Project Certified Asterisk at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1; Certified Asterisk 20.7-cert11, 22.8-cert3

Technical details

A buffer over-read vulnerability exists in the PJSIP MWI (Message Waiting Indicator) body parser in res/res_pjsip_pubsub.c. An authenticated attacker can trigger the crash by sending a malformed SIP NOTIFY request with Content-Type: application/simple-message-summary. The fix adds length validation to prevent reading past buffer boundaries.

Affected products

Asterisk Project Asterisk before 20.20.1, 21.12.3, 22.10.1, 23.4.1
Asterisk Project Certified Asterisk before 20.7-cert11, 22.8-cert3

Timeline

2026-10-27: disclosed

References

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