CVE-2026-51844Public exploitNetwork attack vector

Unauthenticated code execution via unchecked cloneType copy

Published Jun 19, 2026 · Updated Jun 19, 2026

Stack buffer overflow in Tenda AC7 15.03.06.44 allows remote attackers to execute code via a crafted cloneType HTTP parameter. The check_param_changed method passes the user-controlled value to strcpy, which copies it into a fixed-size stack buffer without a length check. The endpoint is network-reachable without privileges; the resulting stack corruption supports a router crash or arbitrary code execution.

CVSS severity9.8
Critical
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in Tenda AC7 15.03.06.44 allows remote attackers to execute code via a crafted cloneType HTTP parameter. The check_param_changed method passes the user-controlled value to strcpy, which copies it into a fixed-size stack buffer without a length check. The endpoint is network-reachable without privileges; the resulting stack corruption supports a router crash or arbitrary code execution.

The record

CVE
CVE-2026-51844
Published
Jun 19, 2026
Updated
Jun 19, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-121, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 19, 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

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 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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