What is the CVSS score of CVE-2026-2181?

CVE-2026-2181 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: 0.1%.

Which versions of Rx3 Firmware are affected by CVE-2026-2181?

A HIGH severity vulnerability (CVE-2026-2181) affects Tenda RX3 wireless routers with no patch currently available, creating immediate risk for organizations using this equipment.

Is there a public PoC exploit available for CVE-2026-2181?

Yes, a public proof-of-concept exploit is available for CVE-2026-2181. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-2181?

Within 24 hours: Inventory all Tenda RX3 16.03.13.11 devices in your environment and isolate affected units from production networks if business-critical. Within 7 days: Implement network segmentation to restrict access to the /goform/openSchedWifi endpoint and disable the WiFi scheduling feature if not operationally required. Within 30 days: Contact Tenda for patch availability updates, evaluate replacement with patched firmware or alternative router vendors, and conduct network forensics to determine if devices have been compromised.

Rx3 Firmware CVE-2026-2181

HIGH

Buffer Overflow (CWE-119)

2026-02-08 cna@vuldb.com

Buffer Overflow Stack Overflow Tenda Rx3 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

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

Feb 10, 2026 - 14:43 vuln.today

Public exploit code

CVE Published

Feb 08, 2026 - 20:15 nvd

HIGH 8.8

DescriptionCVE.org

A security flaw has been discovered in Tenda RX3 16.03.13.11. Affected by this vulnerability is an unknown functionality of the file /goform/openSchedWifi. Performing a manipulation of the argument schedStartTime/schedEndTime results in stack-based buffer overflow. The attack may be initiated remotely. The exploit has been released to the public and may be used for attacks.

AnalysisAI

Remote code execution in Tenda RX3 firmware versions up to 16.03.13.11 via stack-based buffer overflow in the /goform/openSchedWifi endpoint allows unauthenticated attackers to execute arbitrary code by manipulating the schedStartTime and schedEndTime parameters. Public exploit code exists and no patch is currently available. This vulnerability affects network devices and poses an immediate risk to deployed systems.

Technical ContextAI

Classified as CWE-119 (Buffer Overflow). Affects Rx3 Firmware. A security flaw has been discovered in Tenda RX3 16.03.13.11. Affected by this vulnerability is an unknown functionality of the file /goform/openSchedWifi. Performing a manipulation of the argument schedStartTime/schedEndTime results in stack-based buffer overflow. The attack may be initiated remotely. The exploit has been released to the public and may be used for attacks.

RemediationAI

Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.