CVE-2025-51087Public exploitNetwork attack vector

Unauthenticated memory corruption via unbounded time parameter

Published Jul 24, 2025 · Updated Jul 5, 2026

Stack-based buffer overflow in Tenda AC8V4 firmware 16.03.34.06 allows remote attackers to corrupt memory via a crafted HTTP POST. The compare_parentcontrol_time function accepts the unbounded time form field and passes it to sscanf for transfer into a stack buffer. The request requires no authentication or user interaction; the published proof of concept supplies 2,000 bytes, but it does not demonstrate code execution.

CVSS severity8.6
High
EPSS probability8.49%
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 AC8V4 firmware 16.03.34.06 allows remote attackers to corrupt memory via a crafted HTTP POST. The compare_parentcontrol_time function accepts the unbounded time form field and passes it to sscanf for transfer into a stack buffer. The request requires no authentication or user interaction; the published proof of concept supplies 2,000 bytes, but it does not demonstrate code execution.

The record

CVE
CVE-2025-51087
Published
Jul 24, 2025
Updated
Jul 5, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-121, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 5, 2026Record 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

8.6CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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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