CVE-2025-5861Public exploitNetwork attack vector

Memory corruption via unbounded LAN mask copy

Published Jun 9, 2025 · Updated Jun 9, 2025

Buffer overflow in Tenda AC7 15.03.06.44 allows remote attackers to corrupt memory through a crafted LAN mask. The fromadvsetlanip handler passes the attacker-controlled lanMask POST value to strcpy without checking its length against the destination buffer. The public proof of concept demonstrates the overflow trigger from the router's reachable management network, but it does not demonstrate code execution.

CVSS severity9.8
Critical
EPSS probability6.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Tenda AC7 15.03.06.44 allows remote attackers to corrupt memory through a crafted LAN mask. The fromadvsetlanip handler passes the attacker-controlled lanMask POST value to strcpy without checking its length against the destination buffer. The public proof of concept demonstrates the overflow trigger from the router's reachable management network, but it does not demonstrate code execution.

The record

CVE
CVE-2025-5861
Published
Jun 9, 2025
Updated
Jun 9, 2025
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AC7
Classifications
CWE-119, CWE-120, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 2025Record 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=15.03.06.44

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · AC7version=15.03.06.44

Published CVSS scores

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
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-120Buffer Copy without Checking Size of Input ('Classic 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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