What is the CVSS score of CVE-2026-36615?

CVE-2026-36615 has a CVSS 3.1 base score of 4.3 (Medium). CVSS vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N. EPSS exploitation probability: 0.0%.

Mercusys AC12G CVE-2026-36615

EUVD-2026-34153 MEDIUM

Information Exposure (CWE-200)

2026-06-03 mitre

GHSA-9v66-826q-jx8j

Information Disclosure N A

4.3

CVSS 3.1 · Vendor: mitre

Severity by source

Vendor (mitre) PRIMARY

4.3 MEDIUM

AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Primary rating from Vendor (mitre) · only source for this CVE.

CVSS VectorVendor: mitre

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Jun 03, 2026 - 20:36 vuln.today

CVSS changed

Jun 03, 2026 - 19:22 NVD

4.3 (MEDIUM)

CVE Published

Jun 03, 2026 - 00:00 nvd

UNKNOWN (no severity yet)

DescriptionCVE.org

Mercusys AC12G (EU) V1 with firmware AC12G(EU)_V1_200909 exposes an undocumented /agileconfigreset endpoint that returns internal buffer contents to unauthenticated attackers on the adjacent network.

AnalysisAI

Unauthenticated information disclosure in the Mercusys AC12G (EU) V1 router allows any attacker on the adjacent network to retrieve internal buffer contents by querying an undocumented /agileconfigreset HTTP endpoint, confirmed for firmware version AC12G(EU)_V1_200909. The CVSS vector (AV:A/AC:L/PR:N/UI:N) confirms no authentication or user interaction is required, though exploitation is bounded to the local network segment rather than the internet. No public exploit has been identified at time of analysis, and no vendor patch has been confirmed.

Technical ContextAI

The Mercusys AC12G is a consumer-grade 802.11ac Wi-Fi router manufactured by Mercusys (a TP-Link subsidiary). The vulnerability resides in the router's embedded HTTP management interface firmware, which exposes an undocumented endpoint /agileconfigreset that returns raw internal buffer contents when accessed. CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor) identifies the root cause: the firmware includes a debug or legacy endpoint that was never removed or access-controlled before production release. The CVSS attack vector AV:A (Adjacent Network) confirms the attacker must share the same broadcast domain - LAN-connected or Wi-Fi-associated - as the device. CPE data in the provided intelligence is non-specific (cpe:2.3:a:n/a:n/a), limiting authoritative version scoping to what the researcher advisory directly reports.

RemediationAI

No vendor-released patch has been identified at time of analysis - Mercusys has not published a remediation advisory in the provided reference set. Monitor the researcher advisory at https://github.com/Tymbark7372/MERCUSYS-AC12G/blob/master/advisories/CVE-2026-36615.md and the Mercusys/TP-Link firmware portal for updates to AC12G(EU)_V1 firmware beyond version AC12G(EU)_V1_200909. As a compensating control, segment untrusted devices (guests, IoT) onto a separate VLAN or SSID that does not share a broadcast domain with the router's LAN management IP, directly preventing adjacent-network access from untrusted parties - though this requires a managed switch or secondary AP and may not be feasible on the AC12G itself. Disabling the router's web management interface from the wireless interface (if the firmware permits interface binding) would reduce exposure, but this capability is unconfirmed for this model. Do not expose the router's management interface to the internet via port forwarding.