Which versions of Tenda are affected by CVE-2026-5991?

Tenda F451 wireless router firmware 1.0.0.7 contains a stack-based buffer overflow in the web management interface that allows authenticated attackers to execute arbitrary code or disable the device.

How to fix or mitigate CVE-2026-5991?

Within 24 hours: Inventory all Tenda F451 devices running firmware version 1.0.0.7 and document their network locations and access controls. Within 7 days: Check Tenda security advisories for patched firmware versions; if available, schedule firmware updates during maintenance windows. Within 30 days: Implement network segmentation to restrict access to router web management interfaces using firewall rules and VLANs; enforce strong authentication for any management access and disable remote management if not operationally required.

Tenda CVE-2026-5991

Q: What is the CVSS score of CVE-2026-5991?

CVE-2026-5991 has a CVSS 4.0 base score of 7.4 (High). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

EUVD-2026-21244 HIGH

Buffer Overflow (CWE-119)

2026-04-10 cna@vuldb.com

GHSA-rv6j-fg2j-q2fj

Buffer Overflow Tenda

7.4

CVSS 4.0

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Re-analysis Queued

Apr 29, 2026 - 20:07 vuln.today

cvss_changed

EUVD ID Assigned

Apr 10, 2026 - 00:22 euvd

EUVD-2026-21244

Analysis Generated

Apr 10, 2026 - 00:22 vuln.today

CVE Published

Apr 10, 2026 - 00:16 nvd

HIGH 7.4

DescriptionNVD

A vulnerability was found in Tenda F451 1.0.0.7. Affected by this issue is the function formWrlExtraSet of the file /goform/WrlExtraSet. The manipulation of the argument GO results in stack-based buffer overflow. The attack may be launched remotely. The exploit has been made public and could be used.

AnalysisAI

Stack-based buffer overflow in Tenda F451 wireless router firmware 1.0.0.7 allows authenticated remote attackers to execute arbitrary code or crash the device via crafted GO parameter to the formWrlExtraSet function in /goform/WrlExtraSet endpoint. The vulnerability permits complete compromise of device confidentiality and integrity. …

RemediationAI

Within 24 hours: Inventory all Tenda F451 devices running firmware version 1.0.0.7 and document their network locations and access controls. Within 7 days: Check Tenda security advisories for patched firmware versions; if available, schedule firmware updates during maintenance windows. …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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CVE-2026-5991 vulnerability details – vuln.today

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Tenda CVE-2026-5991

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Tenda CVE-2026-5991

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