CVE-2018-19988: In the /HNAP1/SetClientInfoDemo message, the AudioMute and AudioEnable parameters are vulnerable, and the vuln

This week

CRITICAL 9.8REMOTEMITIGATE

CVE-2018-19988 is a critical-severity flaw (CVSS 9.8) affecting dir-868l firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In the /HNAP1/SetClientInfoDemo message, the AudioMute and AudioEnable parameters are vulnerable, and the vulnerabilities affect D-Link DIR-868L Rev.B 2.05B02 devices. In the SetClientInfoDemo.php source code, the AudioMute and AudioEnble parameters are saved in the ShellPath script file without any regex checking. After the script file is executed, the command injection occurs. It needs to bypass the wget command option with a single quote. A vu

Why this priority

Critical severity
EPSS top 6%: 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	7.4% (top 6%)
CISA exploited list	No
Weakness	CWE-78
Published	2019-05-13
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: d-link

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

Am I affected?

Timeline

2019-05-13 14:29 UTCPublished CVE record published
2026-06-17 01:50 UTCUpdated Record last modified

d-link dir-868l firmware MITIGATE

Affected: 2.05b02

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.05b02

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-2018-19988?

dir-868l firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-19988 being exploited?

CVE-2018-19988 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-2018-19988 affect?

CVE-2018-19988 affects dir-868l firmware. Severity is critical (CVSS 9.8). In the /HNAP1/SetClientInfoDemo message, the AudioMute and AudioEnable parameters are vulnerable, and the vulnerabilities affect D-Link DIR-868L Rev.B 2.05B02 devices. In the SetClientInfoDemo.php source code, the AudioMute and AudioEnble p

How urgent is CVE-2018-19988?

Priority 68/100. Critical severity; EPSS top 6%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities · D-Link vulnerabilities

Related CVEs

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CVE-2025-55583 CRITICAL 9.8 MITIGATE D-Link DIR-868L B1 router firmware version FW2.05WWB02 contains an unauthenticated OS command injection vulner
CVE-2023-39668 CRITICAL 9.8 MITIGATE D-Link DIR-868L fw_revA_1-12_eu_multi_20170316 was discovered to contain a buffer overflow via the param_2 par
CVE-2023-39667 CRITICAL 9.8 MITIGATE D-Link DIR-868L fw_revA_1-12_eu_multi_20170316 was discovered to contain a buffer overflow via the param_2 par

References

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