CVE-2025-50528Public exploitNetwork attack vector

Router crash via unbounded page formatting

Published Jun 27, 2025 · Updated Jun 27, 2025

Stack-based buffer overflow in Tenda AC6 firmware 15.03.05.19 and earlier allows remote attackers to crash the router via an HTTP request. The fromNatStaticSetting function passes the untrusted page value to sprintf when formatting nat_static.asp?page=%s into fixed-size stack buffer s without checking its length. An unauthenticated request with a page value longer than 0x120 bytes overwrites the stack and triggers a segmentation fault, interrupting router service.

CVSS severity7.3
High
EPSS probability0.33%
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 AC6 firmware 15.03.05.19 and earlier allows remote attackers to crash the router via an HTTP request. The fromNatStaticSetting function passes the untrusted page value to sprintf when formatting nat_static.asp?page=%s into fixed-size stack buffer s without checking its length. An unauthenticated request with a page value longer than 0x120 bytes overwrites the stack and triggers a segmentation fault, interrupting router service.

The record

CVE
CVE-2025-50528
Published
Jun 27, 2025
Updated
Jun 27, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-121, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 27, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 27, 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

7.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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
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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