CVE-2025-12235Public exploit

Memory corruption via unbounded page formatting

Published Oct 27, 2025 · Updated Oct 27, 2025

Buffer overflow in Tenda CH22 firmware 1.0.0.1 allows attackers on the local network to corrupt memory through a crafted page value. The fromSetIpBind function passes the user-controlled page parameter to sprintf, which writes into a 256-byte buffer without a length check. A public POST-based proof of concept reports no authentication and demonstrates crash reachability, although the published CVSS vectors require low privileges; code execution is described but not demonstrated.

CVSS severity8.0
High
EPSS probability4.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Tenda CH22 firmware 1.0.0.1 allows attackers on the local network to corrupt memory through a crafted page value. The fromSetIpBind function passes the user-controlled page parameter to sprintf, which writes into a 256-byte buffer without a length check. A public POST-based proof of concept reports no authentication and demonstrates crash reachability, although the published CVSS vectors require low privileges; code execution is described but not demonstrated.

The record

CVE
CVE-2025-12235
Published
Oct 27, 2025
Updated
Oct 27, 2025
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
CH22 Firmware
Classifications
CWE-119, CWE-120, T1210
Attack vector
adjacent
Privileges
Unavailable

Timeline

How it unfolded

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

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0.1

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesUnavailable in this record.

What is affected?

Shenzhen Tenda Technology Co., Ltd. · CH22 Firmwareversion=1.0.0.1

Published CVSS scores

8.0VulDBCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.7VulDBAV:A/AC:L/Au:S/C:C/I:C/A:C
7.3VulDBCVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1210Exploitation of Remote Services

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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