CVE-2026-6988Public exploitNetwork attack vector

Boa service crash via unbounded nextHop copy

Published Apr 25, 2026 · Updated Apr 25, 2026

Stack-based buffer overflow in Tenda HG10 firmware HG7_HG9_HG10re_300001138_en_xpon allows remote authenticated users to crash Boa. The formRoute handler passes the request-controlled nextHop value from boaGetVar to strcpy, which copies it into a 20-byte stack buffer without a length check. The CNA rates the path as low-privileged, although the public proof of concept states that authentication is unnecessary; only a Boa service crash is demonstrated.

CVSS severity8.8
High
EPSS probability0.62%
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 HG10 firmware HG7_HG9_HG10re_300001138_en_xpon allows remote authenticated users to crash Boa. The formRoute handler passes the request-controlled nextHop value from boaGetVar to strcpy, which copies it into a 20-byte stack buffer without a length check. The CNA rates the path as low-privileged, although the public proof of concept states that authentication is unnecessary; only a Boa service crash is demonstrated.

The record

CVE
CVE-2026-6988
Published
Apr 25, 2026
Updated
Apr 25, 2026
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
HG10
Classifications
CWE-120, CWE-119, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 25, 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=HG7_HG9_HG10re_300001138_en_xpon

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · HG10version=HG7_HG9_HG10re_300001138_en_xpon

Published CVSS scores

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

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-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1190Exploit Public-Facing Application

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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