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 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

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

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. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Send authenticated HTTP request to /goform/openSchedWifi

Exploit

Inject oversized payload into schedStartTime/schedEndTime parameter

Execution

Trigger stack buffer overflow

Impact

Execute arbitrary code with device privileges

Access

Send authenticated HTTP request to /goform/openSchedWifi

Exploit

Inject oversized payload into schedStartTime/schedEndTime parameter

Execution

Trigger stack buffer overflow

Impact

Execute arbitrary code with device privileges

Vulnerability AssessmentAI

Exploitation	Tenda RX3 firmware version 16.03.13.11 with /goform/openSchedWifi endpoint accessible; attacker must possess valid login credentials (PR:L); vulnerable scheduling feature enabled by default in affected firmware version. 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	A remote attacker could exploit this flaw, stack-based buffer overflow.
Remediation	Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

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. …

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

CVE-2026-2181 vulnerability details – vuln.today

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Rx3 Firmware CVE-2026-2181

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