How severe is CVE-2020-26301?

CVE-2020-26301 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2020-26301 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-26301?

CVE-2020-26301 affects Ssh2 Project Ssh2. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-26301?

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-2020-26301 published?

CVE-2020-26301 was published on 2021-09-20 and last updated on 2026-06-17.

CVE-2020-26301

CVE-2020-26301 is a high-severity vulnerability in Ssh2 Project Ssh2 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. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.5
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Ssh2 Project Ssh2
Published: 2021-09-20
Last modified: 2026-06-17

Description

ssh2 is client and server modules written in pure JavaScript for node.js. In ssh2 before version 1.4.0 there is a command injection vulnerability. The issue only exists on Windows. This issue may lead to remote code execution if a client of the library calls the vulnerable method with untrusted input. This is fixed in version 1.4.0.

Frequently asked questions

What is CVE-2020-26301?: ssh2 is client and server modules written in pure JavaScript for node.js. In ssh2 before version 1.4.0 there is a command injection vulnerability. The issue only exists on Windows. This issue may lead to remote code execution if a client of the library calls the vulnerable method with untrusted input. This is fixed in version 1.4.0.
How severe is CVE-2020-26301?: CVE-2020-26301 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2020-26301 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-26301?: CVE-2020-26301 affects Ssh2 Project Ssh2. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-26301?: 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-2020-26301 published?: CVE-2020-26301 was published on 2021-09-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:ssh2_project:ssh2:*:*:*:*:*:node.js:*:*

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