SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2017-17877

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…

CRITICAL 9.8EPSS 4.10%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (4.10%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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.

CVSS 3.0
9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
4.10% probability · 91th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Affected
valvesoftware/steam link firmware
Source
cve@mitre.org
EPSS trend
0%3%5%27 October 2026: 4.10%27 October 202627 October 2026

EPSS 4.1% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.