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CVE Record

CVE-2019-9228: An issue was discovered on AudioCodes Mediant 500L-MSBR, 500-MBSR, M800B-MSBR and 800C-MSBR devices with fi...

An issue was discovered on AudioCodes Mediant 500L-MSBR, 500-MBSR, M800B-MSBR and 800C-MSBR devices with firmware versions F7.20A at least to 7.20A.252.062. The (1) management SSH and (2) management TELNET features allow remote attackers to cause a denial of service (connection slot exhaustion) via 5 unauthenticated connection attempts, because the maximum number of unauthenticated clients that can be configured is 5. NOTE: the vendor's position is that this is a "design choice.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

Certain AudioCodes Mediant MSBR devices can have their management SSH or Telnet access tied up by a small number of unauthenticated connection attempts. The reported impact is denial of service for management access, not data theft or device takeover. The vendor reportedly considers this behavior a design choice.

Executive priority

Treat this as an operational resilience issue for network and voice infrastructure management. Prioritize exposed or business-critical devices, especially where loss of management access would delay incident response or service recovery.

Technical view

CVE-2019-9228 affects AudioCodes Mediant 500L-MSBR, 500-MBSR, M800B-MSBR, and 800C-MSBR devices on firmware F7.20A through at least 7.20A.252.062. Management SSH and Telnet can exhaust unauthenticated client connection slots because the configurable maximum is five. CVSS, CWE, and vendor patch details are not provided in the source bundle.

Likely exposure

Exposure is most relevant where affected AudioCodes management SSH or Telnet services are reachable from untrusted networks. Internet-exposed, partner-accessible, or broadly internal management planes would carry more operational risk than tightly restricted administrative networks.

Exploitation context

The bundle does not show CISA KEV listing or cited evidence of active exploitation. The issue appears simple to trigger in principle, but the documented impact is management-plane denial of service through connection slot exhaustion.

Researcher notes

The public record is sparse: no CVSS vector, CWE mapping, CPE data, or patch information is included. The vendor position quoted in the CVE says this is a design choice, so validation should focus on reachable management services, firmware scope, and vendor-supported controls.

Mitigation direction

  • Check current AudioCodes guidance for supported firmware or configuration advice.
  • Restrict management SSH and Telnet access to trusted administration networks.
  • Remove public or broad internal exposure from affected management interfaces.
  • Disable Telnet where it is not operationally required.
  • Monitor management access logs for repeated unauthenticated connection pressure.

Validation and detection

  • Inventory AudioCodes Mediant MSBR models and firmware versions in scope.
  • Confirm whether management SSH or Telnet is enabled on affected devices.
  • Verify which networks can reach the management interfaces.
  • Review logs for repeated unauthenticated management connection failures.
  • Document any vendor guidance or support response for this CVE.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

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CVE-2019-9228 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.