TRENDnet TEW-755AP ssi email.cgi log_email_server command injection

published 2026-08-19 2 mo ago modified 2026-08-21 2 mo ago also EUVD-2026-63136

cvss: 7.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.8%; EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits: 0; none known

A security flaw has been discovered in TRENDnet TEW-755AP up to 20260702. This affects the function log_email_server of the file /cgi-bin/email.cgi of the component ssi. Performing a manipulation results in command injection. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 2 mo ago (2026-08-21)

Exploit prediction

1.82% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/meishigana/CVE/blob/main/team15_20260702/14_755ap-ssi-cmdi/poc/poc-ssi-injection.py referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	5.3	CVSS: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
CNA	3.1	7.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L/E:P/RL:X/RC:R
CNA	3.0	7.4	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L/E:P/RL:X/RC:R
CNA	2.0	6.5	AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
CNA	4.0	2.1	CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA	3.1	7.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
CNA	2.0	6.5	AV:N/AC:L/Au:S/C:P/I:P/A:P

Affected products

TRENDnet TEW-755AP

Classification

Weakness

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

References

github.com /meishigana/CVE/blob/main/team15_20260702/14_755ap-ssi-cmdi/poc/poc-ssi-injection.py
exploit
vuldb.com /vuln/393088
vdb-entry, technical-description
vuldb.com /vuln/393088/cti
signature, permissions-required
vuldb.com /cve/CVE-2026-76591
third-party-advisory
vuldb.com /submit/877853
third-party-advisory
github.com /meishigana/CVE/tree/main/team15_20260702/14_755ap-ssi-cmdi
related

Sources

CVE List CVE-2026-76591
NVD CVE-2026-76591

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary