CVE-2026-15696Public exploitNetwork attack vector

Service crash via unchecked sprintf write

Published Jul 14, 2026 · Updated Jul 14, 2026

Stack-based buffer overflow in Tenda BE12 Pro 16.03.66.23 allows remote attackers to crash the web server via an oversized page value. The fromVirtualSer function passes the user-controlled page parameter to sprintf, which writes into the fixed 256-byte stack buffer s without a length check. The public proof of concept reaches /goform/VirtualSer without authentication and demonstrates the service interruption; adjacent-memory corruption also exposes a code-execution path.

CVSS severity8.8
High
EPSS probability0.85%
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 BE12 Pro 16.03.66.23 allows remote attackers to crash the web server via an oversized page value. The fromVirtualSer function passes the user-controlled page parameter to sprintf, which writes into the fixed 256-byte stack buffer s without a length check. The public proof of concept reaches /goform/VirtualSer without authentication and demonstrates the service interruption; adjacent-memory corruption also exposes a code-execution path.

The record

CVE
CVE-2026-15696
Published
Jul 14, 2026
Updated
Jul 14, 2026
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
BE12 Pro
Classifications
CWE-121, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 14, 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=16.03.66.23

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · BE12 Proversion=16.03.66.23

Published CVSS scores

8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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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