CVE-2026-3807Public exploitNetwork attack vector

Authenticated code execution via unchecked mit_ssid formatting

Published Mar 9, 2026 · Updated Mar 9, 2026

Stack-based buffer overflow in Tenda FH1202 1.2.0.14(408) allows remote authenticated users to execute code via a crafted mit_ssid value. The formWrlsafeset handler for /goform/AdvSetWrlsafeset passes the user-controlled mit_ssid value to sprintf without a length check, overflowing the local stack buffer s__1. Low-privileged access to the router web interface is required; successful exploitation can execute code in the httpd process or crash that service.

CVSS severity8.8
High
EPSS probability0.64%
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 FH1202 1.2.0.14(408) allows remote authenticated users to execute code via a crafted mit_ssid value. The formWrlsafeset handler for /goform/AdvSetWrlsafeset passes the user-controlled mit_ssid value to sprintf without a length check, overflowing the local stack buffer s__1. Low-privileged access to the router web interface is required; successful exploitation can execute code in the httpd process or crash that service.

The record

CVE
CVE-2026-3807
Published
Mar 9, 2026
Updated
Mar 9, 2026
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
FH1202
Classifications
CWE-121, CWE-119, CAPEC-100, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 9, 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?

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

  1. Affected versionversion=1.2.0.14(408)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · FH1202version=1.2.0.14(408)

Published CVSS scores

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
8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/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
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
CAPEC-100Overflow Buffers
T1068Exploitation for Privilege Escalation

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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