What is the CVSS score of CVE-2026-26736?

CVE-2026-26736 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Which versions of A3002ru Firmware are affected by CVE-2026-26736?

A critical buffer overflow vulnerability affects TOTOLIK A3002RU_V3 routers, allowing remote attackers to execute arbitrary code with high probability of success.

Is there a public PoC exploit available for CVE-2026-26736?

Yes, a public proof-of-concept exploit is available for CVE-2026-26736. Prioritise patching immediately. EPSS: 0.2%.

How to fix or mitigate CVE-2026-26736?

Within 24 hours: Inventory all TOTOLINK A3002RU_V3 devices in production and isolate or restrict network access if possible. Within 7 days: Implement network segmentation to limit router access to trusted administrative sources only, disable IPv6 configuration interfaces if not required, and monitor for exploitation attempts. Within 30 days: Plan replacement or migration to an alternative router vendor with active security support, as no patch timeline is available from TOTOLINK.

A3002ru Firmware CVE-2026-26736

HIGH

Out-of-bounds Write (CWE-787)

2026-02-17 cve@mitre.org

Buffer Overflow Stack Overflow A3002ru Firmware

8.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

PoC Detected

Mar 09, 2026 - 17:16 vuln.today

Public exploit code

CVE Published

Feb 17, 2026 - 19:21 nvd

HIGH 8.8

DescriptionCVE.org

TOTOLINK A3002RU_V3 V3.0.0-B20220304.1804 was discovered to contain a stack-based buffer overflow via the static_ipv6 parameter in the formIpv6Setup function.

AnalysisAI

Stack-based buffer overflow in TOTOLIK A3002RU firmware versions up to V3.0.0-B20220304.1804 allows authenticated attackers to achieve remote code execution through a malicious static_ipv6 parameter. Public exploit code exists for this vulnerability, and no patch is currently available. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Authenticate to router web interface

Exploit

Send crafted HTTP request with oversized static_ipv6 parameter

Execution

Trigger stack buffer overflow in formIpv6Setup

Impact

Execute arbitrary code as root

Access

Authenticate to router web interface

Exploit

Send crafted HTTP request with oversized static_ipv6 parameter

Execution

Trigger stack buffer overflow in formIpv6Setup

Impact

Execute arbitrary code as root

Vulnerability AssessmentAI

Exploitation	TOTOLINK A3002RU_V3 running firmware V3.0.0-B20220304.1804. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	CVSS 8.8 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker could exploit this vulnerability to compromise the affected system.
Remediation	Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Inventory all TOTOLINK A3002RU_V3 devices in production and isolate or restrict network access if possible. …

Threat intelligence, references, and detailed analysis are available after sign-in.

CVE-2026-26736 vulnerability details – vuln.today

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A3002ru Firmware CVE-2026-26736

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

AnalysisAI

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Attack ChainAIDerived

Vulnerability AssessmentAI

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External POC / Exploit Code