How severe is CVE-2020-5739?

CVE-2020-5739 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-5739 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-5739?

CVE-2020-5739 primarily affects Grandstream Gxp1610 Firmware. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-5739?

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-2020-5739 published?

CVE-2020-5739 was published on 2020-04-14 and last updated on 2026-06-17.

CVE-2020-5739

CVE-2020-5739 is a high-severity vulnerability in Grandstream Gxp1610 Firmware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 5% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Grandstream Gxp1610 Firmware
Published: 2020-04-14
Last modified: 2026-06-17

Description

Grandstream GXP1600 series firmware 1.0.4.152 and below is vulnerable to authenticated remote command execution when an attacker adds an OpenVPN up script to the phone's VPN settings via the "Additional Settings" field in the web interface. When the VPN's connection is established, the user defined script is executed with root privileges.

Frequently asked questions

What is CVE-2020-5739?: Grandstream GXP1600 series firmware 1.0.4.152 and below is vulnerable to authenticated remote command execution when an attacker adds an OpenVPN up script to the phone's VPN settings via the "Additional Settings" field in the web interface. When the VPN's connection is established, the user defined script is executed with root privileges.
How severe is CVE-2020-5739?: CVE-2020-5739 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-5739 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-5739?: CVE-2020-5739 primarily affects Grandstream Gxp1610 Firmware. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-5739?: 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-2020-5739 published?: CVE-2020-5739 was published on 2020-04-14 and last updated on 2026-06-17.

References

https://www.tenable.com/security/research/tra-2020-22

Affected products (6)

cpe:2.3:o:grandstream:gxp1610_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:grandstream:gxp1615_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:grandstream:gxp1620_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:grandstream:gxp1625_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:grandstream:gxp1628_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:grandstream:gxp1630_firmware:*:*:*:*:*:*:*:*

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