CVE-2016-2331: The web interface on SysLINK SL-1000 Machine-to-Machine (M2M) Modular Gateway devices with firmware before 01A

This week

CRITICAL 9.8REMOTEMITIGATE

CVE-2016-2331 is a critical-severity flaw (CVSS 9.8) affecting syslink sl-1000 modular gateway firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The web interface on SysLINK SL-1000 Machine-to-Machine (M2M) Modular Gateway devices with firmware before 01A.8 has a default password, which makes it easier for remote attackers to obtain access via unspecified vectors.

Why this priority

Critical severity
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	2.5% (top 16%)
CISA exploited list	No
Weakness	CWE-255
Published	2016-04-25
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2016-04-25 18:59 UTCPublished CVE record published
2026-06-17 00:43 UTCUpdated Record last modified

systech syslink sl-1000 modular gateway 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-2016-2331?

syslink sl-1000 modular gateway firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2016-2331 being exploited?

CVE-2016-2331 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-2016-2331 affect?

CVE-2016-2331 affects syslink sl-1000 modular gateway firmware. Severity is critical (CVSS 9.8). The web interface on SysLINK SL-1000 Machine-to-Machine (M2M) Modular Gateway devices with firmware before 01A.8 has a default password, which makes it easier for remote attackers to obtain access via unspecified vectors.

How urgent is CVE-2016-2331?

Priority 60/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2016-2333 HIGH 7.5 MITIGATE SysLINK SL-1000 Machine-to-Machine (M2M) Modular Gateway devices with firmware before 01A.8 use the same hardc
CVE-2016-2332 HIGH 8.8 MITIGATE flu.cgi in the web interface on SysLINK SL-1000 Machine-to-Machine (M2M) Modular Gateway devices with firmware

References

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