How severe is CVE-2021-37188?

CVE-2021-37188 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-2021-37188 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-37188?

CVE-2021-37188 primarily affects Digi Transport Dr64 Firmware. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-37188?

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-2021-37188 published?

CVE-2021-37188 was published on 2021-12-10 and last updated on 2026-06-17.

CVE-2021-37188

CVE-2021-37188 is a high-severity vulnerability in Digi Transport Dr64 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-345.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.5
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-345
Affected product: Digi Transport Dr64 Firmware
Published: 2021-12-10
Last modified: 2026-06-17

Description

An issue was discovered on Digi TransPort devices through 2021-07-21. An authenticated attacker may load customized firmware (because the bootloader does not verify that it is authentic), changing the behavior of the gateway.

Frequently asked questions

What is CVE-2021-37188?: An issue was discovered on Digi TransPort devices through 2021-07-21. An authenticated attacker may load customized firmware (because the bootloader does not verify that it is authentic), changing the behavior of the gateway.
How severe is CVE-2021-37188?: CVE-2021-37188 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-2021-37188 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-37188?: CVE-2021-37188 primarily affects Digi Transport Dr64 Firmware. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-37188?: 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-2021-37188 published?: CVE-2021-37188 was published on 2021-12-10 and last updated on 2026-06-17.

References

Affected products (9)

cpe:2.3:o:digi:transport_dr64_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:digi:transport_dr64_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:digi:transport_vc74_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:digi:transport_wr11_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:digi:transport_wr11_xt_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:digi:transport_wr21_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:digi:transport_wr31_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:digi:transport_wr41_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:digi:transport_wr44_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Digi Transport Dr64 Firmware

CVE-2021-35978 — Critical (CVSS 9.8): An issue was discovered in Digi TransPort DR64, SR44 VC74, and WR. The ZING protocol allows arbitrary remote command…
CVE-2021-37187 — Medium (CVSS 6.5): An issue was discovered on Digi TransPort devices through 2021-07-21. An authenticated attacker may read a password…

All CVEs affecting Digi Transport Dr64 Firmware →

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