Is CVE-2017-17877 in the CISA KEV catalog?

No. CVE-2017-17877 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-17877?

CVE-2017-17877 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2017-17877?

CVE-2017-17877 has an EPSS score of 4.10% (90th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-17877?

Upgrade steam link firmware to 644 or later.

CVE & CISA-KEV Catalog

CVE-2017-17877

CRITICALEPSS 90th pctl

9.8

CVSS v3

NVD

Description

An issue was discovered in Valve Steam Link build 643. When the SSH daemon is enabled for local development, the device is publicly available via IPv6 TCP port 22 over the internet (with stateless address autoconfiguration) by default, which makes it easier for remote attackers to obtain access by guessing 24 bits of the MAC address and attempting a root login. This can be exploited in conjunction with CVE-2017-17878.

How to fix

Remediation Available

steam link firmwareNVD

Affected:< 644Fixed in:644CVE-2017-17877derived 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 RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

4.10%probability of exploitation in 30 days

90thpercentile

Elevated risk: more likely to be exploited than 90% of all known CVEs.

References

Third-Party Advisory3

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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 2026-05-13.