Is CVE-2021-37915 in the CISA KEV catalog?

No. CVE-2021-37915 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-37915?

CVE-2021-37915 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2021-37915?

CVE-2021-37915 has an EPSS score of 1.96% (78th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-37915?

Upgrade ht801 firmware to 1.0.29.8 or later.

CVE & CISA-KEV Catalog

CVE-2021-37915

HIGHEPSS 78th pctl

8.8

CVSS v3

NVD

Description

An issue was discovered on the Grandstream HT801 Analog Telephone Adaptor before 1.0.29.8. From the limited configuration shell, it is possible to set the malicious gdb_debug_server variable. As a result, after a reboot, the device downloads and executes malicious scripts from an attacker-defined host.

How to fix

Remediation Available

ht801 firmwareNVD

Affected:< 1.0.29.8Fixed in:1.0.29.8CVE-2021-37915derived from NVD

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

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

1.96%probability of exploitation in 30 days

78thpercentile

Elevated risk: more likely to be exploited than 78% of all known CVEs.

References

Exploit1

secforce.com

Vendor Advisory1

grandstream.com

Other references1

firmware.grandstream.com

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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 2024-11-21.