CVE-2023-26566

HIGH

Sangoma FreePBX 1805 through 2203 on Linux contains hardcoded credentials for the Asterisk REST Interface (ARI), which allows remote attackers to reconfigure Asterisk and make external and internal...

Affects 1 product across 4 vendors.

CVSS 3.18.6
EPSS0.7%
Percentile53th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, no user interaction needed, impact contained to the vulnerable component, full integrity impact.
CWE Weakness Definitions
CWE-798: Use of Hard-Coded Credentials

Software contains embedded passwords or keys that cannot be changed by the administrator.

Related Attack Patterns (CAPEC)
CAPEC-70 Try Common or Default Usernames and Passwords
via CWE-798
CAPEC-191 Read Sensitive Constants Within an Executable
via CWE-798

Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.

◆ AI Analysis — automated analysis, not human-reviewed

Sangoma FreePBX versions 1805 through 2203 on Linux have hardcoded credentials for the Asterisk REST Interface (ARI), enabling remote attackers to reconfigure Asterisk and make calls.

BSID: BS-2024-GLOBAL-049601-H • Model: /workspace/models/qwen2.5-coder-32b-instruct-bf16 • Confidence: HIGH

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Frequently Asked Questions
What is CVE-2023-26566?
Sangoma FreePBX versions 1805 through 2203 on Linux have hardcoded credentials for the Asterisk REST Interface (ARI), enabling remote attackers to reconfigure Asterisk and make calls.
What is the CVSS score for CVE-2023-26566?
CVE-2023-26566 has CVSS 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L. EPSS: 0.7%.
Is CVE-2023-26566 actively exploited?
No confirmed active exploitation of CVE-2023-26566 as of 2026-09-25.
How do I remediate CVE-2023-26566?
Priority: IMMEDIATE.
What systems are affected by CVE-2023-26566?
CVE-2023-26566 affects Asterisk; Freepbx; Linux; Sangoma Freepbx Linux 7.
Vulnerability Details
CVE IDCVE-2023-26566
BSIDBS-2024-GLOBAL-049601-H BreachSpider Global ID
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
Published2024-05-14
Last Modified2026-06-17
ICS Relevance15%
Weakness (CWE)
SourceNVD
Official Description

Sangoma FreePBX 1805 through 2203 on Linux contains hardcoded credentials for the Asterisk REST Interface (ARI), which allows remote attackers to reconfigure Asterisk and make external and internal calls via HTTP and WebSocket requests sent to the API.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

Attackers can exploit hardcoded credentials to authenticate to the ARI, allowing them to send HTTP and WebSocket requests to manipulate Asterisk configurations and initiate calls.

Exploitation Likelihood: HIGH

Affected Products
VendorProductAffected Versions
Asterisk — —
Freepbx — —
Linux — —
Sangoma Freepbx Linux 7 ≥ 1805, ≤ 2203
Remediation

No official vendor advisory link on record. See the CVE record →

Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 884 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
AI Enrichment Record — provenance & audit hash
Model/workspace/models/qwen2.5-coder-32b-instruct-bf16
ConfidenceHIGH
Enriched At2026-05-24
SHA-512 Audit Hashec572f0ef1bfcdb3a418c4b82a4bff36c39ec23c2c528ee92731bb6ae1f1b54f26623f99e9f83de7fc77742193886cc29d0c304d99dc278c412109c4455b2785
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