CVE-2025-12212Public exploitNetwork attack vector

Authenticated service interruption via unbounded UPnP setting

Published Oct 27, 2025 · Updated Oct 27, 2025

Stack-based buffer overflow in Tenda O3 firmware 1.0.0.10(2478) allows remote authenticated users to crash the device via HTTP. The setNetworkService handler stores an unbounded upnpEn POST value in adv.upnp.en, and getNetworkService later copies it into a stack buffer without a length check. Low-privileged management access is required; triggering the read corrupts the stack and interrupts service.

CVSS severity8.8
High
EPSS probability0.74%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Tenda O3 firmware 1.0.0.10(2478) allows remote authenticated users to crash the device via HTTP. The setNetworkService handler stores an unbounded upnpEn POST value in adv.upnp.en, and getNetworkService later copies it into a stack buffer without a length check. Low-privileged management access is required; triggering the read corrupts the stack and interrupts service.

The record

CVE
CVE-2025-12212
Published
Oct 27, 2025
Updated
Oct 27, 2025
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
O3
Classifications
CWE-121, CWE-119, T1210
Attack vector
network
Privileges
authenticated

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=1.0.0.10(2478)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · O3version=1.0.0.10(2478)

Published CVSS scores

8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C
7.4VulDBCVSS:4.0/AV:N/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.

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No observations available

Sep 11, 2026Sep 17, 2026
Latest reporting daySep 17, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
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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