CVE-2015-8286: Zhuhai RaySharp firmware has a hardcoded root password, which makes it easier for remote attackers to obtain a

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CRITICAL 9.8REMOTEMITIGATE

CVE-2015-8286 is a critical-severity flaw (CVSS 9.8) affecting raysharp firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Zhuhai RaySharp firmware has a hardcoded root password, which makes it easier for remote attackers to obtain access via a session on TCP port 23 or 9000.

Why this priority

Critical severity
EPSS top 8%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	4.6% (top 8%)
CISA exploited list	No
Weakness	CWE-254
Published	2016-02-18
Last modified	2026-06-17

Publisher (CNA): CERT/CC · Vendor: zhuhai

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2016-02-18 05:59 UTCPublished CVE record published
2026-06-17 00:34 UTCUpdated Record last modified

zhuhai raysharp firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2015-8286?

raysharp firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2015-8286 being exploited?

CVE-2015-8286 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2015-8286 affect?

CVE-2015-8286 affects raysharp firmware. Severity is critical (CVSS 9.8). Zhuhai RaySharp firmware has a hardcoded root password, which makes it easier for remote attackers to obtain access via a session on TCP port 23 or 9000.

How urgent is CVE-2015-8286?

Priority 67/100. Critical severity; EPSS top 8%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

References

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