CVE-2018-7756: RunExeFile.exe in the installer for DEWESoft X3 SP1 (64-bit) devices does not require authentication for sessi

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CRITICAL 9.8REMOTEMITIGATE

CVE-2018-7756 is a critical-severity flaw (CVSS 9.8) affecting dewesoft. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

RunExeFile.exe in the installer for DEWESoft X3 SP1 (64-bit) devices does not require authentication for sessions on TCP port 1999, which allows remote attackers to execute arbitrary code or access internal commands, as demonstrated by a RUN command that launches a .EXE file located at an arbitrary external URL, or a "SETFIREWALL Off" command.

Why this priority

Critical severity
EPSS top 1%: 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	60.7% (top 1%)
CISA exploited list	No
Weakness	CWE-94
Published	2018-03-15
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: dewesoft

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

Am I affected?

Timeline

2018-03-15 01:29 UTCPublished CVE record published
2026-06-17 02:03 UTCUpdated Record last modified

dewesoft dewesoft MITIGATE

Affected: x3 sp1

Fixed in: no fixed release known

Safe to downgrade to: a release before x3

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: DEWESoft X3 SP1 (x64) - Remote Command Execution

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-2018-7756?

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

Is CVE-2018-7756 being exploited?

CVE-2018-7756 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-2018-7756 affect?

CVE-2018-7756 affects dewesoft. Severity is critical (CVSS 9.8). RunExeFile.exe in the installer for DEWESoft X3 SP1 (64-bit) devices does not require authentication for sessions on TCP port 1999, which allows remote attackers to execute arbitrary code or access internal commands, as demonstrated by a RU

How urgent is CVE-2018-7756?

Priority 69/100. Critical severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

References

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