EUVD-2026-31632
GHSA-gw85-4wrc-rp3f
Severity by source
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/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
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
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/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
Lifecycle Timeline
2DescriptionCVE.org
A vulnerability was detected in Edimax EW-7438RPn 1.31. This affects the function formHwSet of the file /goform/formHwSet. The manipulation of the argument Anntena/Mcs/regDomain/nic0Addr/nic1Addr/wlanAddr/wanAddr/wlanSSID/wlanChan/initgain/txcck/txofdm/submit-url results in stack-based buffer overflow. The attack can be executed remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
AnalysisAI
Stack-based buffer overflow in the Edimax EW-7438RPn 1.31 wireless range extender allows remote attackers with low privileges to corrupt memory and likely achieve code execution by manipulating multiple parameters (Anntena, Mcs, regDomain, nic0Addr/nic1Addr/wlanAddr/wanAddr, wlanSSID, wlanChan, initgain, txcck, txofdm, submit-url) sent to the formHwSet handler at /goform/formHwSet. Publicly available exploit code exists on GitHub, but EPSS rates real-world exploitation probability at only 0.04% (13th percentile) and the issue is not in CISA KEV. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker needs network reachability to the device's HTTP administration interface on /goform/formHwSet AND valid low-privilege web-UI credentials (CVSS PR:L) - exploitation is not anonymous despite the description's 'executed remotely' phrasing. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals are mixed and partially conflicting. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker on the same LAN segment as the extender (or reaching it from the WAN if admin is foolishly exposed) authenticates to the web UI with valid or default credentials, then sends a crafted POST request to /goform/formHwSet with an oversized value in one of the vulnerable parameters such as wlanSSID or nic0Addr, overflowing the stack buffer in formHwSet. A public PoC at github.com/wudipjq/my_vuln demonstrates the crash primitive, which on this class of MIPS/ARM SOHO firmware typically yields code execution as root, giving the attacker a persistent foothold for traffic interception, DNS hijacking, or pivoting into the internal network. |
| Remediation | No vendor-released patch identified at time of analysis - Edimax did not respond to the researcher's coordinated disclosure attempt. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Audit network inventory to identify all Edimax EW-7438RPn v1.31 units and map their business criticality and network location. …
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External POC / Exploit Code
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