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Vulnerabilities

Vulnerability · CVE-2025-7421

A vulnerability was found in Tenda O3V2 1.0.0.12(3880).

Published Jul 11, 2025 · catalog updated Jul 11, 2025 · Tenda O3V2

Check this week

CVE-2025-7421 is not in CISA KEV. FIRST estimates a 96.00% chance of exploitation in the next 30 days. Check whether you run Tenda O3V2.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
96.00%
Remediation
Vendor / distro source
Affected products
vendor Tenda O3V2 1.0.0.12(3880)

A vulnerability was found in Tenda O3V2 1.0.0.12(3880). It has been rated as critical. This issue affects the function fromMacFilterModify of the file /goform/operateMacFilter of the component httpd. The manipulation of the argument mac leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Tenda O3V2 1.0.0.12(3880)1.0.0.12(3880)

How to fix CVE-2025-7421

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2025-7421 is not in CISA KEV. FIRST estimates a 96.00% chance of exploitation in the next 30 days. Check whether you run Tenda O3V2.

Which versions are affected?

Compare what you have installed with Tenda O3V2 1.0.0.12(3880) 1.0.0.12(3880). Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 96.00%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jul 11, 2025 · EUVD

    Detected

    A vulnerability was found in Tenda O3V2 1.0.0.12(3880). It has been rated as critical. This issue affects the function fromMacFilterModify of the file /goform/operateMacFilter of the component httpd. The manipulation of the argument mac leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

  2. Jul 11, 2025 · EUVD

    Updated

    A vulnerability was found in Tenda O3V2 1.0.0.12(3880). It has been rated as critical. This issue affects the function fromMacFilterModify of the file /goform/operateMacFilter of the component httpd. The manipulation of the argument mac leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Sources

  • CVE.orgVulnerability recordCVE-2025-7421

    Official CVE identifier

    cve.org
  • EUVDVulnerability recordEUVD-2025-21090

    A vulnerability was found in Tenda O3V2 1.0.0.12(3880). It has been rated as critical. This issue affects the function fromMacFilterModify of the file /goform/operateMacFilter of the component httpd. The manipulation of the argument mac leads to stack-based buffer overflow. The a

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Jul 11, 2025. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.