How severe is CVE-2026-2187?

CVE-2026-2187 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-2187 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-2187?

CVE-2026-2187 affects Tenda Rx3 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-2187?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-2187 have an EU (EUVD) identifier?

Yes. CVE-2026-2187 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5763.

When was CVE-2026-2187 published?

CVE-2026-2187 was published on 2026-02-08 and last updated on 2026-06-17.

CVE-2026-2187

CVE-2026-2187 is a high-severity vulnerability in Tenda Rx3 Firmware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
CVSS v4: 7.4
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-5763
Weakness: CWE-119
Affected product: Tenda Rx3 Firmware
Published: 2026-02-08
Last modified: 2026-06-17

Description

A vulnerability was found in Tenda RX3 16.03.13.11. The affected element is the function set_qosMib_list of the file /goform/formSetQosBand. Performing a manipulation of the argument list results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been made public and could be used.

Frequently asked questions

What is CVE-2026-2187?: A vulnerability was found in Tenda RX3 16.03.13.11. The affected element is the function set_qosMib_list of the file /goform/formSetQosBand. Performing a manipulation of the argument list results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been made public and could be used.
How severe is CVE-2026-2187?: CVE-2026-2187 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-2187 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-2187?: CVE-2026-2187 affects Tenda Rx3 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-2187?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-2187 have an EU (EUVD) identifier?: Yes. CVE-2026-2187 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-5763.
When was CVE-2026-2187 published?: CVE-2026-2187 was published on 2026-02-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:rx3_firmware:16.03.13.11:*:*:*:*:*:*:*

More vulnerabilities in Tenda Rx3 Firmware

CVE-2025-44899 — Critical (CVSS 9.8): There is a stack overflow vulnerability in Tenda RX3 V1.0br_V16.03.13.11 In the fromSetWifiGusetBasic function of the…
CVE-2026-2186 — High (CVSS 8.8): A vulnerability has been found in Tenda RX3 16.03.13.11. Impacted is the function fromSetIpMacBind of the file…
CVE-2026-2185 — High (CVSS 8.8): A flaw has been found in Tenda RX3 16.03.13.11. This issue affects the function set_device_name of the file…
CVE-2026-2181 — High (CVSS 8.8): A security flaw has been discovered in Tenda RX3 16.03.13.11. Affected by this vulnerability is an unknown…
CVE-2026-2180 — High (CVSS 8.8): A vulnerability was identified in Tenda RX3 16.03.13.11. Affected is an unknown function of the file…
CVE-2025-5527 — High (CVSS 8.8): A vulnerability was found in Tenda RX3 16.03.13.11_multi_TDE01. It has been rated as critical. This issue affects the…

All CVEs affecting Tenda Rx3 Firmware →

Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities

CVE-2026-2778 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability was fixed in…
CVE-2026-2776 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability…
CVE-2025-1866 — Critical (CVSS 10.0): Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in warmcat libwebsockets allows…
CVE-2022-27625 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2022-27624 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2020-11896 — Critical (CVSS 10.0): The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.

Browse all CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities →