How severe is CVE-2020-9355?

CVE-2020-9355 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-2020-9355 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-9355?

CVE-2020-9355 primarily affects Networkmanager-ssh Project Networkmanager-ssh. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-9355?

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-2020-9355 published?

CVE-2020-9355 was published on 2020-02-23 and last updated on 2026-06-17.

CVE-2020-9355

CVE-2020-9355 is a critical-severity vulnerability in Networkmanager-ssh Project Networkmanager-ssh 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.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Networkmanager-ssh Project Networkmanager-ssh
Published: 2020-02-23
Last modified: 2026-06-17

Description

danfruehauf NetworkManager-ssh before 1.2.11 allows privilege escalation because extra options are mishandled.

Frequently asked questions

What is CVE-2020-9355?: danfruehauf NetworkManager-ssh before 1.2.11 allows privilege escalation because extra options are mishandled.
How severe is CVE-2020-9355?: CVE-2020-9355 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-2020-9355 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-9355?: CVE-2020-9355 primarily affects Networkmanager-ssh Project Networkmanager-ssh. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-9355?: 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-2020-9355 published?: CVE-2020-9355 was published on 2020-02-23 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:networkmanager-ssh_project:networkmanager-ssh:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*