CVE-2021-46319Public exploitNetwork attack vector

Remote command execution via SSID filter bypass

Published Feb 17, 2022 · Updated Aug 4, 2024

OS command injection in D-Link DIR-846 firmware 100A43 and 100A53DLA allows remote attackers to execute commands through crafted SSIDs. The HNAP SetMasterWLanSettings handler incompletely filters ssid0 and ssid1 before shell use, allowing newlines or backticks to reach command substitution. The published request uses HNAP authentication and session cookies, while NVD scores privileges as none; successful injection can reboot or fully compromise the router.

CVSS severity9.8
Critical
EPSS probability6.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in D-Link DIR-846 firmware 100A43 and 100A53DLA allows remote attackers to execute commands through crafted SSIDs. The HNAP SetMasterWLanSettings handler incompletely filters ssid0 and ssid1 before shell use, allowing newlines or backticks to reach command substitution. The published request uses HNAP authentication and session cookies, while NVD scores privileges as none; successful injection can reboot or fully compromise the router.

The record

CVE
CVE-2021-46319
Published
Feb 17, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-78, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 17, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0NIST NVDAV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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