CVE-2026-75783Public exploit

Adjacent code execution via DHCP option overflow

Published Aug 18, 2026 · Updated Aug 18, 2026

Stack-based buffer overflow in /sbin/netifd in TRENDnet TEW-WLC100P 12.07b01 allows attackers to execute code via crafted DHCP options. The published technical report states that netifd's get_env() uses strcpy() to copy DHCP option 42 or 6 values into a fixed-size stack buffer with no bounds check, allowing an overlong blobmsg value to overwrite the saved return address. Reachability requires a malicious DHCP server on the same LAN and a DHCP lease or renewal event; the public PoC shows return-address control and a resulting crash during lease processing.

CVSS severity9.6
Critical
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in /sbin/netifd in TRENDnet TEW-WLC100P 12.07b01 allows attackers to execute code via crafted DHCP options. The published technical report states that netifd's get_env() uses strcpy() to copy DHCP option 42 or 6 values into a fixed-size stack buffer with no bounds check, allowing an overlong blobmsg value to overwrite the saved return address. Reachability requires a malicious DHCP server on the same LAN and a DHCP lease or renewal event; the public PoC shows return-address control and a resulting crash during lease processing.

The record

CVE
CVE-2026-75783
Published
Aug 18, 2026
Updated
Aug 18, 2026
Vendor
TRENDnet
Product
TEW-WLC100P
Classifications
CWE-119, CWE-121, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 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=12.07b01

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

TRENDnet · TEW-WLC100Pversion=12.07b01

Published CVSS scores

8.6VulDBCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P
8.3VulDBAV:A/AC:L/Au:N/C:C/I:C/A:C
9.6VulDBCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-121Stack-based Buffer Overflow
T1210Exploitation of Remote Services

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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