Is CVE-2026-5990 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-5990 being exploited in the wild.

How severe is CVE-2026-5990?

High severity, with a CVSS score of 8.8, published 10 April 2026.

Is there a fix for CVE-2026-5990?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-5990 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-5990?

Check whether you run Tenda F451 or Tenda F451 Firmware. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-5990: Tenda F451 stack buffer overflow in fromSafeEmailFilter

CVE-2026-5990 · Severity: high · CVSS 8.8 · Published 2026-04-10

A vulnerability exists in the Tenda F451 wireless router that could allow an attacker to disrupt the device or take control of it. By sending a specially crafted request to the router's email filtering settings, an attacker can cause a system crash or execute unauthorized commands. This could lead to a total loss of internet connectivity or the compromise of data passing through the network.

Technologies: Tenda F451, Tenda F451 Firmware. Vendors: Tenda.

Quick answers

Is CVE-2026-5990 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-5990 being exploited in the wild.
How severe is CVE-2026-5990?: High severity, with a CVSS score of 8.8, published 10 April 2026.
Which products and versions are affected?: Tenda F451 1.0.0.7.
Is there a fix for CVE-2026-5990?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-5990 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-5990?: Check whether you run Tenda F451 or Tenda F451 Firmware. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A stack-based buffer overflow vulnerability exists in the Tenda F451 router, firmware version 1.0.0.7. The flaw is located within the 'fromSafeEmailFilter' function in the '/goform/SafeEmailFilter' component. An attacker can trigger the overflow by manipulating the 'page' argument in a remote request. Successful exploitation requires low-level authentication (PR:L) but can lead to full system compromise, including arbitrary code execution or a denial-of-service (DoS) condition. Public exploit code is reportedly available.

Affected products

Tenda F451 1.0.0.7

Timeline

2026-04-10: disclosed: Initial publication date

References

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