How severe is CVE-2025-12211?

CVE-2025-12211 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-2025-12211 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-12211?

CVE-2025-12211 affects Tenda O3 Firmware1.0.0.10(2478). See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-12211?

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-2025-12211 have an EU (EUVD) identifier?

Yes. CVE-2025-12211 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-36074.

When was CVE-2025-12211 published?

CVE-2025-12211 was published on 2025-10-27 and last updated on 2026-06-17.

CVE-2025-12211

CVE-2025-12211 is a high-severity vulnerability in Tenda O3 Firmware1.0.0.10(2478) 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% (51st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-36074
Weakness: CWE-119
Affected product: Tenda O3 Firmware1.0.0.10(2478)
Published: 2025-10-27
Last modified: 2026-06-17

Description

A security flaw has been discovered in Tenda O3 1.0.0.10(2478). Affected by this issue is the function SetValue/GetValue of the file /goform/setDmzInfo. The manipulation of the argument dmzIP results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks.

Frequently asked questions

What is CVE-2025-12211?: A security flaw has been discovered in Tenda O3 1.0.0.10(2478). Affected by this issue is the function SetValue/GetValue of the file /goform/setDmzInfo. The manipulation of the argument dmzIP results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks.
How severe is CVE-2025-12211?: CVE-2025-12211 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-2025-12211 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-12211?: CVE-2025-12211 affects Tenda O3 Firmware1.0.0.10(2478). See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-12211?: 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-2025-12211 have an EU (EUVD) identifier?: Yes. CVE-2025-12211 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-36074.
When was CVE-2025-12211 published?: CVE-2025-12211 was published on 2025-10-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:tenda:o3_firmware1.0.0.10\(2478\):*:*:*:*:*:*:*:*

More vulnerabilities in Tenda O3 Firmware1.0.0.10(2478)

CVE-2025-12214 — High (CVSS 8.8): A vulnerability was detected in Tenda O3 1.0.0.10(2478). This issue affects the function SetValue/GetValue of the file…
CVE-2025-12213 — High (CVSS 8.8): A security vulnerability has been detected in Tenda O3 1.0.0.10(2478). This vulnerability affects the function…
CVE-2025-12212 — High (CVSS 8.8): A weakness has been identified in Tenda O3 1.0.0.10(2478). This affects the function SetValue/GetValue of the file…
CVE-2025-12210 — High (CVSS 8.8): A vulnerability was identified in Tenda O3 1.0.0.10(2478). Affected by this vulnerability is the function…
CVE-2025-12209 — High (CVSS 8.8): A vulnerability was determined in Tenda O3 1.0.0.10(2478). Affected is the function SetValue/GetValue of the file…
CVE-2024-6965 — High (CVSS 8.8): A vulnerability has been found in Tenda O3 1.0.0.10 and classified as critical. Affected by this vulnerability is the…

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