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CVE Record

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

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 code, the data in $rphyinf3."/media/wps/enrollee/pin" is used with the wpatalk command without any regex checking. A vulnerable /HNAP1/SetWiFiVerifyAlpha XML message could have shell metacharacters in the WPSPIN element such as the `telnetd` string.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2018-19990 is a command-injection risk in a D-Link DIR-822 B1 202KRb06 router function related to WPS PIN verification. A crafted management message could place unsafe input into router configuration and later pass it to a system command. Business urgency depends on whether this exact router model and firmware are deployed.

Executive priority

Prioritize discovery first. If this exact router model is deployed in business networks, especially where management access is broadly reachable, handle it as a high-priority network-edge risk until vendor support status and exposure are confirmed.

Technical view

The vulnerability is in /HNAP1/SetWiFiVerifyAlpha. The WPSPIN value is stored in internal WPS enrollee PIN configuration without regex validation, then used by wps.php do_wps with the wpatalk command without regex validation. The CVE description cites shell metacharacter handling risk. No CVSS score, CWE, vendor advisory, or patch detail is provided in the bundle.

Likely exposure

Exposure appears limited to D-Link DIR-822 B1 202KRb06 devices reachable by the affected HNAP/WPS management path. The source bundle does not define authentication requirements, WAN reachability, default exposure, or other affected firmware versions, so asset confirmation is required before assigning business impact.

Exploitation context

The source bundle describes a crafted /HNAP1/SetWiFiVerifyAlpha XML message with unsafe WPSPIN content. It does not show CISA KEV listing, public exploitation in the wild, or reliable exploitation prerequisites. Treat active exploitation as unconfirmed based on the provided evidence.

Researcher notes

Evidence is narrow but technically specific: unvalidated WPSPIN input crosses from HNAP XML handling into WPS configuration and command usage. The bundle lacks authentication context, affected-version range, patch status, CVSS, CWE, and exploit telemetry. Avoid extrapolating to other D-Link models without supporting sources.

Mitigation direction

  • Inventory for D-Link DIR-822 B1 202KRb06 devices and firmware.
  • Check D-Link guidance for firmware updates, retirement, or compensating controls.
  • Restrict HNAP and router administration to trusted management networks.
  • Disable WPS only where vendor-supported and operationally acceptable.
  • Replace unsupported exposed devices if no vendor fix exists.

Validation and detection

  • Confirm whether DIR-822 B1 202KRb06 exists in the environment.
  • Verify firmware against vendor support or advisory information.
  • Review network exposure for HNAP and router administration interfaces.
  • Check whether WPS is enabled on affected devices.
  • Look for unusual router configuration changes or unexpected services.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

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