How severe is CVE-2025-12209?

CVE-2025-12209 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-2025-12209 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-12209?

CVE-2025-12209 affects Tenda O3 Firmware1.0.0.10(2478). See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-12209?

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-2025-12209 have an EU (EUVD) identifier?

Yes. CVE-2025-12209 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-36067.

When was CVE-2025-12209 published?

CVE-2025-12209 was published on 2025-10-27 and last updated on 2026-06-17.

CVE-2025-12209

CVE-2025-12209 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% (59th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-36067
Weakness: CWE-119
Affected product: Tenda O3 Firmware1.0.0.10(2478)
Published: 2025-10-27
Last modified: 2026-06-17

Description

A vulnerability was determined in Tenda O3 1.0.0.10(2478). Affected is the function SetValue/GetValue of the file /goform/setDhcpConfig. Executing a manipulation of the argument dhcpEn can lead to stack-based buffer overflow. The attack may be performed from remote. The exploit has been publicly disclosed and may be utilized.

Frequently asked questions

What is CVE-2025-12209?: A vulnerability was determined in Tenda O3 1.0.0.10(2478). Affected is the function SetValue/GetValue of the file /goform/setDhcpConfig. Executing a manipulation of the argument dhcpEn can lead to stack-based buffer overflow. The attack may be performed from remote. The exploit has been publicly disclosed and may be utilized.
How severe is CVE-2025-12209?: CVE-2025-12209 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-2025-12209 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-12209?: CVE-2025-12209 affects Tenda O3 Firmware1.0.0.10(2478). See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-12209?: 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-2025-12209 have an EU (EUVD) identifier?: Yes. CVE-2025-12209 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-36067.
When was CVE-2025-12209 published?: CVE-2025-12209 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\(2478\):*:*:*:*:*:*:*:*

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