CVE-2026-76591Public exploitNetwork attack vector

Authenticated command execution via log_email_server

Published Aug 19, 2026 · Updated Aug 19, 2026

Command injection in TRENDnet TEW-755AP 20260702 and earlier allows remote authenticated users to execute shell commands via log_email_server. The log_email_server handler in /cgi-bin/email.cgi accepts attacker-controlled input and the public PoC shows that shell metacharacters can be appended to that value so additional commands run on the device. VulDB scored the flaw with PR:L, so reachability depends on access to the management interface or another path to the CGI endpoint; the published evidence supports command execution and a public PoC, but not confirmed in-the-wild exploitation.

CVSS severity7.4
High
EPSS probability1.32%
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 TRENDnet TEW-755AP 20260702 and earlier allows remote authenticated users to execute shell commands via log_email_server. The log_email_server handler in /cgi-bin/email.cgi accepts attacker-controlled input and the public PoC shows that shell metacharacters can be appended to that value so additional commands run on the device. VulDB scored the flaw with PR:L, so reachability depends on access to the management interface or another path to the CGI endpoint; the published evidence supports command execution and a public PoC, but not confirmed in-the-wild exploitation.

The record

CVE
CVE-2026-76591
Published
Aug 19, 2026
Updated
Aug 19, 2026
Vendor
TRENDnet
Product
TEW-755AP
Classifications
CWE-74, CWE-77, T1059.004
Attack vector
network
Privileges
authenticated

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=20260702

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TRENDnet · TEW-755APversion=20260702

Published CVSS scores

6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
7.4VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
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

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-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059.004Unix Shell

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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