CVE-2026-76582Public exploitNetwork attack vector

Command execution via ping ipaddr injection

Published Aug 19, 2026 · Updated Aug 19, 2026

Command injection in /cgi-bin/ping.cgi in TRENDnet TEW-821DAP 2.2.01b05 allows remote attackers to execute OS commands via ipaddr. The CGI handler passes the ipaddr value into popen/system without neutralizing shell metacharacters, so a crafted diagnostic request reaches the shell instead of a literal ping target. Reachability is remote; VulDB's published scoring treats the flaw as low-privileged, and the referenced GitHub package includes a public proof of concept for the endpoint.

CVSS severity7.4
High
EPSS probability1.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in /cgi-bin/ping.cgi in TRENDnet TEW-821DAP 2.2.01b05 allows remote attackers to execute OS commands via ipaddr. The CGI handler passes the ipaddr value into popen/system without neutralizing shell metacharacters, so a crafted diagnostic request reaches the shell instead of a literal ping target. Reachability is remote; VulDB's published scoring treats the flaw as low-privileged, and the referenced GitHub package includes a public proof of concept for the endpoint.

The record

CVE
CVE-2026-76582
Published
Aug 19, 2026
Updated
Aug 19, 2026
Vendor
TRENDnet
Product
TEW-821DAP
Classifications
CWE-77, CWE-74, T1059
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.2.01b05

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

TRENDnet · TEW-821DAPversion=2.2.01b05

Published CVSS scores

2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P
7.4VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('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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