CVE-2018-15356: An authenticated attacker can execute arbitrary code using command ejection in Eltex ESP-200 firmware version

This month

HIGH 8.8MITIGATE

CVE-2018-15356 is a high-severity flaw (CVSS 8.8) affecting esp-200 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An authenticated attacker can execute arbitrary code using command ejection in Eltex ESP-200 firmware version 1.2.0.

Why this priority

High severity

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	2.5% (top 15%)
CISA exploited list	No
Weakness	CWE-77
Published	2018-08-17
Last modified	2026-06-17

Publisher (CNA): Kaspersky Labs · Vendor: eltex

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

Am I affected?

Timeline

2018-08-17 15:29 UTCPublished CVE record published
2026-06-17 01:42 UTCUpdated Record last modified

eltex esp-200 firmware MITIGATE

Affected: 1.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2.0

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-2018-15356?

esp-200 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-15356 being exploited?

CVE-2018-15356 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-2018-15356 affect?

CVE-2018-15356 affects esp-200 firmware. Severity is high (CVSS 8.8). An authenticated attacker can execute arbitrary code using command ejection in Eltex ESP-200 firmware version 1.2.0.

How urgent is CVE-2018-15356?

Priority 52/100. High severity

Related CVEs

CVE-2018-15360 HIGH 7.3 MITIGATE An attacker without authentication can login with default credentials for privileged users in Eltex ESP-200 fi
CVE-2018-15359 HIGH 8.8 MITIGATE An authenticated attacker with low privileges can use insecure sudo configuration to expand attack surface in
CVE-2018-15358 HIGH 8.8 MITIGATE An authenticated attacker with low privileges can activate high privileged user and use it to expand attack su
CVE-2018-15357 MEDIUM 6.5 MITIGATE An authenticated attacker with low privileges can extract password hash information for all users in Eltex ESP

References

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