CVE-2025-55483Public exploitNetwork attack vector

Router crash via unchecked deviceList string copy

Published Aug 20, 2025 · Updated Aug 20, 2025

A stack-based buffer overflow in Tenda AC6 firmware 15.03.06.23 allows remote attackers to crash the router via a crafted HTTP request. The formSetMacFilterCfg handler passes an unchecked deviceList value through its parsing chain to strcpy, which copies the string without a length bound. No authentication or user interaction is required; the published assessment limits the demonstrated consequence to a router crash.

CVSS severity7.5
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A stack-based buffer overflow in Tenda AC6 firmware 15.03.06.23 allows remote attackers to crash the router via a crafted HTTP request. The formSetMacFilterCfg handler passes an unchecked deviceList value through its parsing chain to strcpy, which copies the string without a length bound. No authentication or user interaction is required; the published assessment limits the demonstrated consequence to a router crash.

The record

CVE
CVE-2025-55483
Published
Aug 20, 2025
Updated
Aug 20, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-121, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 20, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 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

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 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-121Stack-based Buffer Overflow
T1499Endpoint Denial of Service

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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