CVE-2026-7151Public exploitNetwork attack vector

Authenticated device crash via oversized destNet parameter

Published Apr 27, 2026 · Updated Apr 27, 2026

Stack-based buffer overflow in Tenda HG3 2.0 allows remote authenticated users to crash the device through a crafted IPv6 routing request. The formUploadConfig handler for /boaform/formIPv6Routing fails to validate and bound the attacker-controlled destNet parameter before stack processing. Low-privileged device access is required; an oversized value corrupts the stack and interrupts normal device operation.

CVSS severity8.8
High
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Tenda HG3 2.0 allows remote authenticated users to crash the device through a crafted IPv6 routing request. The formUploadConfig handler for /boaform/formIPv6Routing fails to validate and bound the attacker-controlled destNet parameter before stack processing. Low-privileged device access is required; an oversized value corrupts the stack and interrupts normal device operation.

The record

CVE
CVE-2026-7151
Published
Apr 27, 2026
Updated
Apr 27, 2026
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
HG3
Classifications
CWE-119, CWE-121, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · HG3version=2.0

Published CVSS scores

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
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

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
T1499.004Application or System Exploitation

Public exploit references

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

Technologies

Your stack

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Your stack

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