CVE-2026-3801Public exploitNetwork attack vector

Authenticated memory corruption via oversized ping parameters

Published Mar 9, 2026 · Updated Mar 9, 2026

Stack-based buffer overflow in Tenda i3 1.0.0.6(2204) allows remote authenticated users to corrupt memory via crafted ping settings. The formSetAutoPing handler accepts oversized ping1 or ping2 values from /goform/setAutoPing into stack storage without enforcing a length bound. Low-privileged web-management access reaches the handler; public proof-of-concept requests establish the overflow trigger but not reliable code execution.

CVSS severity8.8
High
EPSS probability0.64%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stack-based buffer overflow in Tenda i3 1.0.0.6(2204) allows remote authenticated users to corrupt memory via crafted ping settings. The formSetAutoPing handler accepts oversized ping1 or ping2 values from /goform/setAutoPing into stack storage without enforcing a length bound. Low-privileged web-management access reaches the handler; public proof-of-concept requests establish the overflow trigger but not reliable code execution.

The record

CVE
CVE-2026-3801
Published
Mar 9, 2026
Updated
Mar 9, 2026
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
i3
Classifications
CWE-119, CWE-121, T1210
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0.6(2204)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · i3version=1.0.0.6(2204)

Published CVSS scores

8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C
7.4VulDBCVSS: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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-121Stack-based Buffer Overflow
T1210Exploitation of Remote Services

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo