CVE-2023-37717Public exploitNetwork attack vector

Unauthenticated code execution via unchecked sprintf

Published Jul 14, 2023 · Updated Oct 30, 2024

Stack overflow in Tenda AC5, AC7, AC9, AC10, AC1206, F1202, and FH1202 firmware allows remote attackers to execute code. The fromDhcpListClient handler passes the page query parameter to sprintf without a length check, overflowing stack buffer v7. The affected releases are AC5 V1.0, AC7 V1.0, AC9 V3.0, AC10 V1.0, AC1206 V1.0, F1202 V1.0BR_V1.2.0.20(408), and FH1202 V1.2.0.19_EN; no authentication or user interaction is required, and exploitation can crash the router or execute attacker-controlled code.

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 AC5, AC7, AC9, AC10, AC1206, F1202, and FH1202 firmware allows remote attackers to execute code. The fromDhcpListClient handler passes the page query parameter to sprintf without a length check, overflowing stack buffer v7. The affected releases are AC5 V1.0, AC7 V1.0, AC9 V3.0, AC10 V1.0, AC1206 V1.0, F1202 V1.0BR_V1.2.0.20(408), and FH1202 V1.2.0.19_EN; no authentication or user interaction is required, and exploitation can crash the router or execute attacker-controlled code.

The record

CVE
CVE-2023-37717
Published
Jul 14, 2023
Updated
Oct 30, 2024
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AC7
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=V1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · AC7version=V1.0
Shenzhen Tenda Technology Co., Ltd. · AC10version=V1.0,
Shenzhen Tenda Technology Co., Ltd. · AC9version=V3.0
Shenzhen Tenda Technology Co., Ltd. · AC1206version=V1.0
Shenzhen Tenda Technology Co., Ltd. · F1202version=V1.0BR_V1.2.0.20(408)
Shenzhen Tenda Technology Co., Ltd. · FH1202version=V1.2.0.19_EN
Shenzhen Tenda Technology Co., Ltd. · AC5version=V1.0

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.

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)
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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