CVE-2018-19990: In the /HNAP1/SetWiFiVerifyAlpha message, the WPSPIN parameter is vulnerable, and the vulnerability affects D-

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CRITICAL 9.8REMOTEMITIGATE

CVE-2018-19990 is a critical-severity flaw (CVSS 9.8) affecting dir-822 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In the /HNAP1/SetWiFiVerifyAlpha message, the WPSPIN parameter is vulnerable, and the vulnerability affects D-Link DIR-822 B1 202KRb06 devices. In the SetWiFiVerifyAlpha.php source code, the WPSPIN parameter is saved in the $rphyinf1."/media/wps/enrollee/pin" and $rphyinf2."/media/wps/enrollee/pin" and $rphyinf3."/media/wps/enrollee/pin" internal configuration memory without any regex checking. And in the do_wps function of the wps.php source cod

Why this priority

Critical severity
EPSS top 8%: 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	5.1% (top 8%)
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-822 firmware MITIGATE

Affected: 202krb06

Fixed in: no fixed release known

Safe to downgrade to: a release before 202krb06

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-2018-19990?

dir-822 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-19990 being exploited?

CVE-2018-19990 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-2018-19990 affect?

CVE-2018-19990 affects dir-822 firmware. Severity is critical (CVSS 9.8). In the /HNAP1/SetWiFiVerifyAlpha message, the WPSPIN parameter is vulnerable, and the vulnerability affects D-Link DIR-822 B1 202KRb06 devices. In the SetWiFiVerifyAlpha.php source code, the WPSPIN parameter is saved in the $rphyinf1."/medi

How urgent is CVE-2018-19990?

Priority 67/100. Critical severity; EPSS top 8%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities · D-Link vulnerabilities

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CVE-2023-51987 CRITICAL 9.8 MITIGATE D-Link DIR-822+ V1.0.2 contains a login bypass in the HNAP1 interface, which allows attackers to log in to adm
CVE-2023-51984 CRITICAL 9.8 MITIGATE D-Link DIR-822+ V1.0.2 was found to contain a command injection in SetStaticRouteSettings function
CVE-2019-6258 CRITICAL 9.8 UPGRADE D-Link DIR-822 Rev.Bx devices with firmware v.202KRb06 and older allow a buffer overflow via long MacAddress d

References

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