CVE-2026-57193

MEDIUMEPSS 80th pctl

6.9

CVSS v4

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, the LDAP realtime driver `res_config_ldap` may permit `LDAP filter injection` through a `SIP username`, allowing an unauthenticated attacker to make arbitrary LDAP queries using carefully crafted SIP packets and disclose information. The `res_config_ldap` module must be loaded and configured to access an LDAP server, which is not the default. 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.

CWE-943

How to fix

Remediation Available

asteriskDebian

Fixed in:1:22.10.1+dfsg+~cs6.17.60671434-1CVE-2026-57193

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v4 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

Impact

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/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

Exploit Intelligence

1.96%probability of exploitation in 30 days

80thpercentile

Elevated risk: more likely to be exploited than 80% of all known CVEs.

References

Other references15

Related Vulnerabilities

Other CWE-943 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-12904	High	8.8	6.4%	-	Fix
CVE-2026-27886	High	7.5	1.9%	-	Fix
CVE-2020-36195	Critical	9.8	1.8%	-	Fix
CVE-2018-7829	High	8.8	1.7%	-	Fix
CVE-2022-36084	Critical	9.9	1.5%	-	Fix
CVE-2021-1349	Medium	6.5	1.4%	-	Fix

Common questions

How do I fix CVE-2026-57193?

Upgrade asterisk on debian unstable to 1:22.10.1+dfsg+~cs6.17.60671434-1 or later.

Is CVE-2026-57193 being actively exploited?

Not that we know of. CVE-2026-57193 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.0% is the estimated probability that it will be exploited in the next 30 days. That is higher than 80% of all scored CVEs.

How severe is CVE-2026-57193?

CVE-2026-57193 has a CVSS v4 base score of 6.9, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-57193 affect?

Published advisories record a fix for asterisk (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2026-57193

Markdown

[![CVE-2026-57193](https://tridentstack.com/cve/badge/CVE-2026-57193.svg)](https://tridentstack.com/cve/CVE-2026-57193)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-57193"><img src="https://tridentstack.com/cve/badge/CVE-2026-57193.svg" alt="CVE-2026-57193"></a>

Check your Linux endpoints for this class of vulnerability

TridentStack Control continuously scans Linux endpoints for known vulnerabilities and deploys the fixes from the same console. 200 endpoints free forever, no credit card.

Patch your fleet free Start freeThis CVE lookup is free and always will be.

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-10-27.