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CVE Record

CVE-2026-9482: Edimax EW-7438RPn formSDHCP stack-based overflow

A vulnerability has been found in Edimax EW-7438RPn 1.31. This impacts the function formSDHCP of the file /goform/formSDHCP. Such manipulation of the argument submit-url leads to stack-based buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CriticalCVSS 9Not KEV-listed Updated
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Glexia's Take critical

Analyst readout for executives and security teams

Plain-English summary

Edimax EW-7438RPn firmware 1.31 has a critical memory corruption flaw in a web management function. A remote authenticated attacker could potentially gain full impact over confidentiality, integrity, and availability. Public proof-of-concept material exists, but the bundle does not show confirmed active exploitation.

Executive priority

Treat as urgent for any deployed affected device. Public exploit disclosure plus critical impact justifies rapid exposure reduction, even though active exploitation is not confirmed.

Technical view

The issue is a stack-based buffer overflow in /goform/formSDHCP, tied to handling of the submit-url argument. The CVSS v2 vector is AV:N/AC:L/Au:S with complete C/I/A impact. It is mapped to CWE-119 and CWE-121.

Likely exposure

Exposure is limited to Edimax EW-7438RPn devices running version 1.31, especially where the web management interface is reachable by untrusted networks or weakly controlled users.

Exploitation context

Sources say the attack can be launched remotely and public exploit material exists. The CVSS vector requires authentication. KEV is false, and no cited source confirms active exploitation in the wild.

Researcher notes

Evidence comes from CVE/VulDB-style reporting and a public GitHub disclosure. Vendor response and official fix status are absent in the provided sources, so remediation confidence depends on follow-up vendor guidance.

Mitigation direction

  • Check Edimax and trusted advisories for firmware updates or official mitigation guidance.
  • Remove internet exposure for the device management interface.
  • Restrict management access to trusted administrative networks only.
  • Rotate device credentials and remove unnecessary accounts.
  • Consider replacing unsupported or unpatched affected devices.

Validation and detection

  • Inventory Edimax EW-7438RPn devices and confirm firmware version 1.31.
  • Verify whether /goform/formSDHCP management access is reachable from untrusted networks.
  • Review access logs for unexpected authenticated management activity.
  • Track CVE, VulDB, and vendor pages for updated remediation information.
Prepared
Confidence
medium
Sources
6

Public sources used

Based on public source material and reviewed before publication.

Potential ATT&CK relevance

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 · low confidence lookup

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 lookup
cwe · low confidence lookup

CWE-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 lookup
cve · low confidence lookup

CVE-2026-9482 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profile CVE Program record
Severity
Critical
CVSS
9 (2.0)
Known Exploited
No
Published

Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR

Official CVE source material

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.

4 CVSS vectors
6 Timeline events
1 ADP providers
5 Source links

SSVC decision data

CISA-ADP CISA Coordinator
Timestamp
Version
2.0.3
Exploitation: pocAutomatable: noTechnical Impact: total

CVSS vector scores

4 official scores

We 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.

Score Version Severity Vector Exploit Impact Source
9 CVSS 2.0 Critical AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR 8 10 VulDB
8.8 CVSS 3.1 High CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R 2.8 5.9 VulDB
8.8 CVSS 3.0 High CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R 2.8 5.9 VulDB
8.7 CVSS 4.0 High CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P — — VulDB

Vulnerability scoring details

Base CVSS 4.0 score

8.7 High
CVSS 4.0 vector shape for CVE-2026-9482 Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. Source timeline VulDB

    Advisory disclosed

  2. Source timeline VulDB

    VulDB entry created

  3. CVE reserved CVE Program

    The CVE ID was reserved by the assigning CNA.

  4. Source timeline VulDB

    VulDB entry last update

  5. CVE published CVE Program

    The CVE record was published.

  6. CVE updated CVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADP CISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

Vendor Product Version / package Status
Edimax EW-7438RPn 1.31 Listed
Weakness

CWE details

CWE-119CWE-121

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-119 · source CWE mapping

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.

Open CWE intelligence Same-CWE CVEs
CWE-121 · source CWE mapping

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.

Open CWE intelligence Same-CWE CVEs