What is CVE-2026-75877?

CVE-2026-75877 is TRENDnet TV-IP751WIC alphapd FUN_0043372C stack-based overflow. The supplied enrichment data classifies it as Remote Code Exec mapped to CWE-121 CWE-121; CWE-119 CWE-119.

Which versions are affected?

Affected product and version evidence is listed in the product table above. Current public advisories should be checked for exact version scope before patch targeting is finalized.

Is there active exploitation?

Active exploitation is not confirmed from current sources for CVE-2026-75877. If exploitation is not confirmed from current sources, teams should document that status and continue monitoring KEV, vendor, and telemetry updates.

No. CVE-2026-75877 is not listed in CISA KEV in the supplied enrichment data. KEV status should be monitored because it can change after initial disclosure or after exploitation becomes publicly confirmed.

Is there a public exploit?

A public PoC is not confirmed from current sources for CVE-2026-75877. Public exploit or PoC availability should raise triage priority, especially for exposed or business-critical systems.

How can defenders detect it?

Start with web/proxy/WAF logs, application logs, network IDS/IPS, EDR process telemetry, host service logs where available. Look for vulnerability-class behavior, product errors, suspicious authentication events, exploit probes, and abnormal process activity based only on evidence that applies to the affected product.

How should teams prioritize it?

Prioritize CVE-2026-75877 using CVSS 9.9, EPSS 0%, KEV status, public PoC status, and asset exposure. Internet-facing, privileged, or business-critical deployments should be handled first.

Are workarounds available?

The supplied mitigation guidance says to apply vendor patches and restrict external exposure until fixed. Fixed-version evidence is listed in the mitigation section above.

Which threat actors are linked publicly?

No public threat actor linkage is confirmed from current sources. Do not attribute exploitation to a threat actor unless the source evidence explicitly supports that linkage.

What should be done in the next 24 hours?

Identify exposed assets running affected vendor/product/version combinations. Prioritize based on EPSS, PoC availability, and external exposure. Search available logs for exploit probes, errors, authentication anomalies, or suspicious child processes matching the vulnerability class. Open remediation tickets with affected assets, owners, evidence status, and detection coverage so decisions are traceable.

criticalRemote Code Exec

CVE-2026-75877

CVE-2026-75877 — TRENDnet TV-IP751WIC alphapd FUN_0043372C stack-based overflow

A flaw has been found in TRENDnet TV-IP751WIC 11.03.03. This vulnerability affects the function SystemNetworkChanged/SystemDDNSChanged/SystemEmailChanged/SystemFTPChanged/websCheckRealm/FUN_00432574/FUN_0043372C of the component alphapd. Executing a manipulation can lead to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been published and may be used.

Published Aug 18, 2026Updated Aug 18, 2026Sources: NVD, TRENDnet (CNA), GitHub, SOCRadar CTI

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the scoring sources call it.

Exploitation

Unreported

no source claims exploitation

EPSS

ahead of 0% of scored CVEs

Affects

TRENDnet

TV-IP751WIC

CVSS base

9.9

critical · 6 sources

Remediation

The vendor's own words where we have them.

Upgrade TV-IP751WIC to a fixed release. Apply vendor patches per advisory and restrict external exposure of the affected component until patched.

First 24 hours

Ordered from the record's own fields — exposure first, because you cannot patch what you have not found.

Identify exposed assets running affected vendor/product/version combinations.
Prioritize based on EPSS, PoC availability, and external exposure.
Search available logs for exploit probes, errors, authentication anomalies, or suspicious child processes matching the vulnerability class.

Affected scope

Vendor, product and version as the advisories word them.

Vendor	Product	Versions	Status
TRENDnet	TV-IP751WIC	11.03.03	Vulnerable

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Availability

High

Confidentiality

High

Integrity

High

Scope

Changed

Attack Complexity

Low

Attack Vector

Network

Privileges Req

Low

User Interaction

None

Every base score collected

Sources score independently and disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Source
9.9	CVSS 3.1	critical	3.1	6	NVD
9	CVSS 2.0	high	8	10	vuldb.com (CNA)
9.4	CVSS 4.0	critical	—	—	TRENDnet (CNA)
9.9	CVSS 3.1	critical	—	—	TRENDnet (CNA)
9.9	CVSS 3.0	critical	—	—	TRENDnet (CNA)
9	CVSS 2.0	critical	—	—	TRENDnet (CNA)

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Weakness & attack patterns

CWE-121
CWE-119

Inferred from the weakness class — not observed against this CVE.

CAPEC-242 · Code InjectionCAPEC-35 · Leverage Executable Code in Non-Executable Files

Detection

Read off the CVSS vector and the weakness class. Starting points, not rules we have tested.

Search application, proxy, and WAF logs for requests touching /SystemDDNSChanged/SystemEmailChanged/SystemFTPChanged/websCheckRealm/FUN_00432574/FUN_0043372C.
Prioritize edge telemetry for network-reachable TV-IP751WIC.

web/proxy/WAF logsapplication logsnetwork IDS/IPSEDR process telemetryhost service logs

Timeline

What happened to this CVE, newest first — with the readings a source repeats on a schedule counted underneath rather than listed.

2026
Added · CVSS 3.1 9.9 (AV:N)
Aug 18, 2026 · NVD
Initial · CVE published
Aug 18, 2026 · NVD
Reported · Advisory disclosed
Aug 18, 2026 · TRENDnet
Reported · VulDB entry created
Aug 18, 2026 · TRENDnet
Reported · VulDB entry last update
Aug 18, 2026 · TRENDnet

References

6 on the record

github.com/meishigana/CVE/blob/main/team15_20260702/09_751wic-apd-password-overflow/poc/poc-password-overflow.py
Exploit, Third Party Advisory
github.com/meishigana/CVE/tree/main/team15_20260702/09_751wic-apd-password-overflow
Exploit, Third Party Advisory
vuldb.com/cve/CVE-2026-75877
Vendor Advisory
vuldb.com/submit/877795
Vendor Advisory
vuldb.com/vuln/391571
Vendor Advisory
vuldb.com/vuln/391571/cti
Vendor Advisory

Elsewhere on this site

TRENDnetevery CVE for this vendor
Remote Code Execsame class
CWE-121other pages naming this weakness

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record1

What should defenders know first?

CVE-2026-75877 is TRENDnet TV-IP751WIC alphapd FUN_0043372C stack-based overflow, a critical vulnerability affecting TV-IP751WIC from TRENDnet. The current evidence does not list it in CISA KEV, and the exploit status is: Active exploitation is not confirmed from current sources for CVE-2026-75877. Public exploit evidence is: A public PoC is not confirmed from current sources for CVE-2026-75877. The affected-version evidence is listed in the key facts and affected products tables. Defenders should first verify whether exposed or business-critical assets run those versions, then apply vendor patches or mitigations, restrict reachable attack surface, and preserve logs for detection review. CVSS 9.9 describes technical severity, while EPSS 0% helps estimate near-term exploit likelihood; neither replaces asset context. Unknown fields should remain explicit in tickets, and threat actor, IOC, victimology, or payload claims should not be added unless a cited source supports them. Monitor CISA KEV, vendor advisories, NVD changes, public PoC repositories, and internal telemetry for update triggers.