CVE-2025-50260Public exploitNetwork attack vector

Unauthenticated service crash via oversized firewallEn

Published Jul 3, 2025 · Updated Jul 3, 2025

Stack-based buffer overflow in Tenda AC6 firmware 15.03.05.16_multi allows remote attackers to crash the router's HTTP service. The formSetFirewallCfg handler accepts an oversized firewallEn HTTP parameter at SetFirewallCfg without enforcing the destination stack buffer's size. No authentication or user interaction is required, and the published assessment limits demonstrated impact to service interruption rather than data access or modification.

CVSS severity7.5
High
EPSS probability0.38%
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 AC6 firmware 15.03.05.16_multi allows remote attackers to crash the router's HTTP service. The formSetFirewallCfg handler accepts an oversized firewallEn HTTP parameter at SetFirewallCfg without enforcing the destination stack buffer's size. No authentication or user interaction is required, and the published assessment limits demonstrated impact to service interruption rather than data access or modification.

The record

CVE
CVE-2025-50260
Published
Jul 3, 2025
Updated
Jul 3, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-121, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 3, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 3, 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
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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