CVE-2026-13518Public exploitNetwork attack vector

Code execution via unbounded sprintf

Published Jun 29, 2026 · Updated Jun 29, 2026

Stack-based buffer overflow in Tenda JD12L 16.03.53.23 allows remote attackers to execute code through a crafted page parameter. The fromAddressNat function passes the unbounded parameter to sprintf, which writes into a fixed 256-byte stack buffer at /goform/addressNat. The published proof of concept reports no authentication gate, while the CNA metrics require low privileges; successful requests can crash the management service or redirect execution.

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 JD12L 16.03.53.23 allows remote attackers to execute code through a crafted page parameter. The fromAddressNat function passes the unbounded parameter to sprintf, which writes into a fixed 256-byte stack buffer at /goform/addressNat. The published proof of concept reports no authentication gate, while the CNA metrics require low privileges; successful requests can crash the management service or redirect execution.

The record

CVE
CVE-2026-13518
Published
Jun 29, 2026
Updated
Jun 29, 2026
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
JD12L
Classifications
CWE-119, CWE-121, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 29, 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=16.03.53.23

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · JD12Lversion=16.03.53.23

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
9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C
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-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-121Stack-based Buffer Overflow
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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