CVE-2025-29386Public exploitNetwork attack vector

Unauthenticated code execution via unchecked strcpy copy

Published Mar 14, 2025 · Updated Mar 19, 2025

Stack-based buffer overflow in Tenda AC9 1.0 firmware 15.03.05.14_multi allows remote attackers to execute arbitrary code via the mac parameter. The fromAdvSetMacMtuWan handler passes the untrusted mac value to strcpy in sub_7345C without checking the destination buffer's capacity. A crafted HTTP POST to the router's management interface can overwrite the stack, causing a crash or attacker-controlled code execution without authentication.

CVSS severity9.8
Critical
EPSS probability0.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Stack-based buffer overflow in Tenda AC9 1.0 firmware 15.03.05.14_multi allows remote attackers to execute arbitrary code via the mac parameter. The fromAdvSetMacMtuWan handler passes the untrusted mac value to strcpy in sub_7345C without checking the destination buffer's capacity. A crafted HTTP POST to the router's management interface can overwrite the stack, causing a crash or attacker-controlled code execution without authentication.

The record

CVE
CVE-2025-29386
Published
Mar 14, 2025
Updated
Mar 19, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Mar 19, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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.

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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-787Out-of-bounds Write
T1210Exploitation of Remote Services

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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