CVE-2023-37723Public exploitNetwork attack vector

Unauthenticated code execution via unchecked page formatting

Published Jul 14, 2023 · Updated Oct 30, 2024

Stack overflow in Tenda F1202 1.0BR_V1.2.0.20(408) and FH1202 1.2.0.19_EN allows remote attackers to execute code. The fromqossetting handler passes the unbounded page value to sprintf, overflowing its stack-based v7 buffer. The management endpoint accepts a crafted HTTP GET without authentication, and exploitation can crash the router or execute code in the firmware context.

CVSS severity9.8
Critical
EPSS probability0.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack overflow in Tenda F1202 1.0BR_V1.2.0.20(408) and FH1202 1.2.0.19_EN allows remote attackers to execute code. The fromqossetting handler passes the unbounded page value to sprintf, overflowing its stack-based v7 buffer. The management endpoint accepts a crafted HTTP GET without authentication, and exploitation can crash the router or execute code in the firmware context.

The record

CVE
CVE-2023-37723
Published
Jul 14, 2023
Updated
Oct 30, 2024
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
F1202
Classifications
CWE-787, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 30, 2024Record 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=V1.0BR_V1.2.0.20(408)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · F1202version=V1.0BR_V1.2.0.20(408)
Shenzhen Tenda Technology Co., Ltd. · FH1202version=V1.2.0.19_EN

Published CVSS scores

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 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
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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