CVE-2018-18852: Cerio DT-300N 1.1.6 through 1.1.12 devices allow OS command injection because of improper input validation of

Q: How do I fix CVE-2018-18852?

dt-300n firmware: upgrade to newer than 1.1.12. Exact commands for each OS are on this page.

Q: Is CVE-2018-18852 being exploited?

CVE-2018-18852 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2018-18852 affect?

CVE-2018-18852 affects dt-300n firmware. Severity is high (CVSS 8.8). Cerio DT-300N 1.1.6 through 1.1.12 devices allow OS command injection because of improper input validation of the web-interface PING feature's use of Save.cgi to execute a ping command, as exploited in the wild in October 2018.

Q: How urgent is CVE-2018-18852?

Priority 56/100. High severity; EPSS top 1%: very likely to be exploited

This week

HIGH 8.8UPGRADE

CVE-2018-18852 is a high-severity flaw (CVSS 8.8) affecting dt-300n firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cerio DT-300N 1.1.6 through 1.1.12 devices allow OS command injection because of improper input validation of the web-interface PING feature's use of Save.cgi to execute a ping command, as exploited in the wild in October 2018.

Why this priority

High severity
EPSS top 1%: very likely to be exploited

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	63.8% (top 1%)
CISA exploited list	No
Weakness	CWE-78
Published	2019-06-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: cerio

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

Am I affected?

Timeline

2019-06-18 15:15 UTCPublished CVE record published
2026-06-17 01:48 UTCUpdated Record last modified

cerio dt-300n firmware UPGRADE

Affected: >= 1.1.6 and <= 1.1.12

Fixed in: newer than 1.1.12

Safe to downgrade to: a release before 1.1.6

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-2018-18852?

dt-300n firmware: upgrade to newer than 1.1.12. Exact commands for each OS are on this page.

Is CVE-2018-18852 being exploited?

CVE-2018-18852 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-2018-18852 affect?

CVE-2018-18852 affects dt-300n firmware. Severity is high (CVSS 8.8). Cerio DT-300N 1.1.6 through 1.1.12 devices allow OS command injection because of improper input validation of the web-interface PING feature's use of Save.cgi to execute a ping command, as exploited in the wild in October 2018.

How urgent is CVE-2018-18852?

Priority 56/100. High severity; EPSS top 1%: very likely to be exploited

References

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