Netgear EX6200 sub_3C8EC buffer overflow

published 2025-04-30 18 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-12785

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.2%; EPSS 1.2% chance of exploitation in 30 days, percentile 68%
public exploits: 0; none known

A vulnerability has been found in Netgear EX6200 1.0.3.94 and classified as critical. This vulnerability affects the function sub_3C8EC. The manipulation of the argument host leads to buffer overflow. The attack can be initiated remotely. The vendor was contacted early about this disclosure but did not respond in any way.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 18 mo ago (2025-05-01)

Exploit prediction

1.22% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/jylsec/vuldb/blob/main/Netgear/netgear_ex6200/Buffer_overflow-sub_3C8EC-gui_Wireless_Security_state/README.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	8.7	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
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA	3.0	8.8	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA	2.0	9.0	AV:N/AC:L/Au:S/C:C/I:C/A:C
CNA	4.0	8.7	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:X/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
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Netgear EX6200

Classification

Weakness

CWE-120 Buffer Copy without Checking Size of Input
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

github.com /jylsec/vuldb/blob/main/Netgear/netgear_ex6200/Buffer_overflow-sub_3C8EC-gui_Wireless_Security_state/README.md
related, exploit
vuldb.com /?id.306634
vdb-entry, technical-description, third-party-advisory
vuldb.com /?ctiid.306634
signature, permissions-required, vdb-entry
vuldb.com /?submit.560790
third-party-advisory, vdb-entry
netgear.com /
product

Sources

CVE List CVE-2025-4142
NVD CVE-2025-4142

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary