How severe is CVE-2019-9228?

CVE-2019-9228 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2019-9228 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-9228?

CVE-2019-9228 primarily affects Audiocodes Median 500l-msbr Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-9228?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-9228 published?

CVE-2019-9228 was published on 2019-07-19 and last updated on 2026-06-17.

CVE-2019-9228

CVE-2019-9228 is a high-severity vulnerability in Audiocodes Median 500l-msbr Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Audiocodes Median 500l-msbr Firmware
Published: 2019-07-19
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2019-9228?: 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.
How severe is CVE-2019-9228?: CVE-2019-9228 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2019-9228 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-9228?: CVE-2019-9228 primarily affects Audiocodes Median 500l-msbr Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-9228?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-9228 published?: CVE-2019-9228 was published on 2019-07-19 and last updated on 2026-06-17.

References

https://www.cirosec.de/fileadmin/1._Unternehmen/1.4._Unsere_Kompetenzen/Security_Advisory_AudioCodes_Mediant_family.pdf

Affected products (4)

cpe:2.3:o:audiocodes:median_500l-msbr_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:audiocodes:median_500-msbr_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:audiocodes:median_m800b-msbr_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:audiocodes:median_800c-msbr_firmware:*:*:*:*:*:*:*:*

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CVE-2019-9229 — High (CVSS 8.8): An issue was discovered on AudioCodes Mediant 500L-MSBR, 500-MBSR, M800B-MSBR and 800C-MSBR devices with firmware…

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