How severe is CVE-2020-18172?

CVE-2020-18172 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-18172 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-18172?

CVE-2020-18172 affects Trezor Bridge. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-18172?

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

When was CVE-2020-18172 published?

CVE-2020-18172 was published on 2021-07-26 and last updated on 2026-06-17.

CVE-2020-18172

CVE-2020-18172 is a critical-severity vulnerability in Trezor Bridge with a CVSS 3.x base score of 9.8. 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: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Trezor Bridge
Published: 2021-07-26
Last modified: 2026-06-17

Description

A code injection vulnerability in the SeDebugPrivilege component of Trezor Bridge 2.0.27 allows attackers to escalate privileges.

Frequently asked questions

What is CVE-2020-18172?: A code injection vulnerability in the SeDebugPrivilege component of Trezor Bridge 2.0.27 allows attackers to escalate privileges.
How severe is CVE-2020-18172?: CVE-2020-18172 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-18172 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-18172?: CVE-2020-18172 affects Trezor Bridge. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-18172?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-18172 published?: CVE-2020-18172 was published on 2021-07-26 and last updated on 2026-06-17.

References

https://github.com/GitHubAssessments/CVE_07_2019/blob/master/Report.pdf

Affected products (1)

cpe:2.3:a:trezor:bridge:2.0.27:*:*:*:*:windows:*:*

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