CVE-2025-70753Public exploitNetwork attack vector

Unauthenticated router crash via unchecked strcpy

Published Jan 13, 2026 · Updated Jan 13, 2026

Stack-based buffer overflow in Tenda AX-1806 firmware 1.0.0.1 allows remote attackers to crash the router via a crafted request. The sub_4CA50 function copies the user-controlled security_5g value into a 256-byte stack buffer with unbounded strcpy. No authentication or user interaction is required; an oversized value sent to /goform/WifiBasicSet interrupts the router's services.

CVSS severity7.5
High
EPSS probability0.45%
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 AX-1806 firmware 1.0.0.1 allows remote attackers to crash the router via a crafted request. The sub_4CA50 function copies the user-controlled security_5g value into a 256-byte stack buffer with unbounded strcpy. No authentication or user interaction is required; an oversized value sent to /goform/WifiBasicSet interrupts the router's services.

The record

CVE
CVE-2025-70753
Published
Jan 13, 2026
Updated
Jan 13, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, CWE-121, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 13, 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

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
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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