What is the CVSS score of CVE-2026-2138?

CVE-2026-2138 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 Tx9 Firmware are affected by CVE-2026-2138?

A high-severity vulnerability (CVSS 8.8) affecting Tenda TX9 routers up to version 22.03.02.10_multi allows attackers to exploit static routing configuration functions, potentially enabling…

Is there a public PoC exploit available for CVE-2026-2138?

Yes, a public proof-of-concept exploit is available for CVE-2026-2138. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-2138?

Within 24 hours: Identify and inventory all Tenda TX9 devices running affected firmware versions; isolate internet-facing units from critical systems if possible. Within 7 days: Implement network access controls restricting administrative access to TX9 devices; monitor for suspicious routing configuration changes and unauthorized access attempts. Within 30 days: Continuously monitor Tenda security advisories for patch availability; prepare emergency patching procedures; consider replacing devices if patches remain unavailable beyond 30 days.

Tx9 Firmware CVE-2026-2138

HIGH

Buffer Overflow (CWE-119)

2026-02-08 cna@vuldb.com

Buffer Overflow Tx9 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 - 19:28 vuln.today

Public exploit code

CVE Published

Feb 08, 2026 - 06:16 nvd

HIGH 8.8

DescriptionCVE.org

A vulnerability was found in Tenda TX9 up to 22.03.02.10_multi. Affected is the function sub_42D03C of the file /goform/SetStaticRouteCfg. The manipulation of the argument list results in buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used.

AnalysisAI

Remote code execution in Tenda TX9 firmware versions up to 22.03.02.10_multi through a buffer overflow in the static route configuration function allows authenticated attackers to achieve full system compromise. Public exploit code exists for this vulnerability, significantly increasing the risk of active exploitation. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Authenticate to Tenda TX9

Exploit

Send crafted SetStaticRouteCfg request

Execution

Overflow buffer in sub_42D03C function

Impact

Execute arbitrary code

Access

Authenticate to Tenda TX9

Exploit

Send crafted SetStaticRouteCfg request

Execution

Overflow buffer in sub_42D03C function

Impact

Execute arbitrary code

Vulnerability AssessmentAI

Exploitation	Authenticated access to Tenda TX9 web interface (version ≤22.03.02.10_multi). … 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, buffer overflow.
Remediation	Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Identify and inventory all Tenda TX9 devices running affected firmware versions; isolate internet-facing units from critical systems if possible. …

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

CVE-2026-2138 vulnerability details – vuln.today

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Tx9 Firmware CVE-2026-2138

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