CVE-2026-57198
Asterisk: Possible RED T.140 Heap Buffer Overflow
Description
Asterisk is an open source private branch exchange and telephony toolkit. In affected deployments, an authenticated attacker may cause a `T.140 RED` heap buffer overflow using carefully crafted packets, potentially allowing remote code execution or causing Asterisk to crash. The `chan_sip` channel driver must be installed and configured, and its `textsupport` option must be enabled; `textsupport` defaults to no. `The chan_sip driver was deprecated in Asterisk 20 and completely removed in all later versions.` Repository comparisons verify patch containment in Asterisk 20.20.1, 21.12.3, 22.10.1 and 23.4.1, and Certified Asterisk 20.7-cert11 and 22.8-cert3. The affected release-track scope remains unresolved: structured metadata includes later release tracks even though the advisory says the required `chan_sip` driver was removed there.
INFO
Published Date :
Oct. 27, 2026, 5:17 p.m.
Last Modified :
Oct. 27, 2026, 5:17 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | LOW | [email protected] |
Solution
- Update Asterisk to a patched version.
- Ensure chan_sip is not installed or textsupport is disabled.
- Install and configure chan_sip with textsupport disabled.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-57198.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-57198 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-57198
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2026-57198 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-57198 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by [email protected]
Oct. 27, 2026
Action Type Old Value New Value Added Description Asterisk is an open source private branch exchange and telephony toolkit. In affected deployments, an authenticated attacker may cause a `T.140 RED` heap buffer overflow using carefully crafted packets, potentially allowing remote code execution or causing Asterisk to crash. The `chan_sip` channel driver must be installed and configured, and its `textsupport` option must be enabled; `textsupport` defaults to no. `The chan_sip driver was deprecated in Asterisk 20 and completely removed in all later versions.` Repository comparisons verify patch containment in Asterisk 20.20.1, 21.12.3, 22.10.1 and 23.4.1, and Certified Asterisk 20.7-cert11 and 22.8-cert3. The affected release-track scope remains unresolved: structured metadata includes later release tracks even though the advisory says the required `chan_sip` driver was removed there. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-122 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/57xxx/CVE-2026-57198.json">CVE-2026-57198</a> Added Reference https://github.com/asterisk/asterisk/commit/0601c33d4edf8c8f221de91cead59460fb1e7180 Added Reference https://github.com/asterisk/asterisk/commit/111487298a954a029daae941eac423f0609b1261 Added Reference https://github.com/asterisk/asterisk/commit/536218a86b797996e8e8844deacc8207de373701 Added Reference https://github.com/asterisk/asterisk/commit/a89b61d7c756f816c7fa5327ead9e889f1531202 Added Reference https://github.com/asterisk/asterisk/commit/eaa108c68a32c080d7a168ef1d8bf784d5d830f4 Added Reference https://github.com/asterisk/asterisk/commit/eef894282be203cb9e6d8e9692e9c360a0b569b4 Added Reference https://github.com/asterisk/asterisk/commit/fde69a1f3ff17f507a1578ae27b528f43ceb5efd Added Reference https://github.com/asterisk/asterisk/releases/tag/20.20.1 Added Reference https://github.com/asterisk/asterisk/releases/tag/21.12.3 Added Reference https://github.com/asterisk/asterisk/releases/tag/22.10.1 Added Reference https://github.com/asterisk/asterisk/releases/tag/23.4.1 Added Reference https://github.com/asterisk/asterisk/releases/tag/certified-20.7-cert11 Added Reference https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3 Added Reference https://github.com/asterisk/asterisk/security/advisories/GHSA-vfhr-r9x9-c687 Added Reference https://github.com/asterisk/asterisk/tree/24.0.0-pre1