Security readout for executives and security teams
Plain-English summary
A nearby, unauthenticated attacker could target a vulnerable TRENDnet wireless controller through its DHCP handling. Successful exploitation may seriously affect data confidentiality, system integrity, and availability. The attack requires local-network access, limiting internet exposure but making compromised devices, guests, or insiders relevant threats.
Executive priority
Prioritize immediate identification and isolation of affected controllers. Local-network requirements reduce broad internet risk, but the critical impact and public exploit disclosure justify urgent action where untrusted or compromised devices can reach firmware 12.07b01.
Technical view
CVE-2026-75783 is a stack-based buffer overflow in the DHCP blobmsg handling of /sbin/netifd on TRENDnet TEW-WLC100P firmware 12.07b01. It has CVSS 3.1 score 9.6 with adjacent-network access, low complexity, no privileges, no user interaction, scope change, and high confidentiality, integrity, and availability impacts.
Likely exposure
Confirmed scope is limited to TRENDnet TEW-WLC100P firmware 12.07b01. Exploitation requires access from within an adjacent or local network. Exposure depends on whether untrusted, guest, or compromised devices can reach the controller's DHCP-related services.
Exploitation context
Public exploit material is referenced, so reproduction or abuse may be easier. However, the supplied sources do not establish active exploitation, and the CVE is not listed as CISA KEV. Treat the public disclosure as elevated risk, not evidence of attacks in the wild.
Researcher notes
The available description identifies the vulnerable binary and DHCP blobmsg component but does not explain the precise triggering condition or confirmed post-overflow outcome. No vendor patch or mitigation is named. Public proof-of-concept material exists; analyze it only in an authorized, isolated environment.
Mitigation direction
- Inventory TEW-WLC100P controllers and identify devices running firmware 12.07b01.
- Restrict controller access to trusted management and infrastructure networks.
- Prevent guest and untrusted network segments from reaching affected DHCP-related services.
- Check TRENDnet guidance for patched firmware or vendor-approved mitigations.
- Increase monitoring for abnormal traffic, crashes, or restarts involving affected controllers.
Validation and detection
- Confirm each controller's exact model and installed firmware version.
- Review network paths from guest, user, and device segments to the controller.
- Verify segmentation rules block unnecessary access to controller services.
- Check logs and monitoring for unexplained netifd failures, crashes, or controller restarts.
- Reassess after applying vendor guidance and document remaining reachable attack paths.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-119: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-121: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-75783 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
4 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R2.86VulDBCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R2.86VulDBCVSS: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——VulDBAV:A/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR6.510VulDBVulnerability scoring details
Base CVSS 4.0 score
9.4CriticalVector: CVSS: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
Base CVSS 3.1 score
9.6CriticalVector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
Base CVSS 3.0 score
9.6CriticalVector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R
Base CVSS 2.0 score
8.3HighVector: AV:A/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- Source timelineVulDB
Advisory disclosed
- Source timelineVulDB
VulDB entry created
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- Source timelineVulDB
VulDB entry last update
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- VDB-391524 | TRENDnet TEW-WLC100P DHCP blobmsg netifd stack-based overflowCVE reference, VulDB · vdb-entry
- VDB-391524 | CTI Indicators (IOB, IOC, IOA)CVE reference, VulDB · signature, permissions-required
- CVE-2026-75783 | CVE Analysis and ReportCVE reference, VulDB · third-party-advisory
- Submit #877772 | TRENDnet TEW-WLC100P TEW-WLC100P Stack-based Buffer OverflowCVE reference, VulDB · third-party-advisory
- https://github.com/meishigana/CVE/tree/main/team15_20260702/01_wlc100p-netifdCVE reference, VulDB · related
- https://github.com/meishigana/CVE/blob/main/team15_20260702/01_wlc100p-netifd/poc/poc-netifd-overflow.pyCVE reference, VulDB · exploit
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Restriction of Operations within the Bounds of a Memory Buffer
Improper Restriction of Operations within the Bounds of a Memory Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Stack-based Buffer Overflow
Stack-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.