EUVD-2026-58622
GHSA-xrpr-8h65-75q6
Severity by source
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
Network-accessible management endpoint with confirmed public POC; PR:L reflects low-privilege authentication requirement per CVSS 4.0 source vector; full CIA impact on the device.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
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
Lifecycle Timeline
5DescriptionCVE.org
A security flaw has been discovered in Tenda W20E 15.11.0.6(1068_1546_841)_CN_TDC. Impacted is the function formQOSRuleDel of the file /goform/delQos of the component QoS Rule Deletion. Performing a manipulation of the argument qosIndex results in stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks.
AnalysisAI
Stack-based buffer overflow in Tenda W20E firmware 15.11.0.6(1068_1546_841)_CN_TDC enables remote low-privileged attackers to execute arbitrary code by submitting a malformed qosIndex parameter to the /goform/delQos endpoint. The vulnerable formQOSRuleDel function fails to validate input length before writing to a fixed-size stack buffer in the QoS Rule Deletion component. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Low-privilege authentication to the Tenda W20E web management interface is required, as indicated by PR:L in the CVSS 4.0 vector - unauthenticated exploitation is not supported by the available data. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H) scores 7.4 and indicates full confidentiality, integrity, and availability impact on the vulnerable system, requiring only low-privilege credentials and no user interaction. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with low-level credentials to the Tenda W20E management interface - obtained via default credentials, credential stuffing, or prior compromise - sends a crafted HTTP POST request to /goform/delQos with an oversized qosIndex value. The formQOSRuleDel function copies the value into a stack buffer without bounds checking, overwriting the return address and enabling arbitrary code execution at router firmware privilege level. … |
| Remediation | No vendor-released patch has been identified at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: identify and inventory all Tenda W20E devices running firmware 15.11.0.6 or earlier; restrict network access to the management interface through firewall rules, permitting connections only from designated administrative subnets; and document current device placement and dependencies. …
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Stack-based buffer overflow in the Tenda W20E router (firmware 15.11.0.6) allows remote authenticated attackers to corru
Stack-based buffer overflow in Tenda W20E firmware 15.11.0.6 allows authenticated remote attackers to corrupt memory via
Stack-based buffer overflow in the Tenda W20E router (firmware 15.11.0.6) allows remote authenticated attackers to corru
Stack-based buffer overflow in Tenda W20E firmware 15.11.0.6(1068_1546_841)_CN_TDC allows remote low-privileged attacker
Stack-based buffer overflow in Tenda W20E firmware 15.11.0.6(1068_1546_841)_CN_TDC allows authenticated remote attackers
Same weakness CWE-121 – Stack-based Buffer Overflow
View allSame technique Stack Overflow
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External POC / Exploit Code
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