CVE-2023-26805Public exploitNetwork attack vector

Authenticated code execution via unbounded sprintf

Published Mar 19, 2023 · Updated Feb 27, 2025

Stack-based buffer overflow in Tenda W20E 15.11.0.6 allows remote authenticated users to crash the device or execute code. The formIPMacBindModify handler passes IPMacBindRuleIp, IPMacBindRuleMac, and IPMacBindRuleRemark to unbounded sprintf into a 512-byte stack buffer. Access to the web administration interface and valid credentials are required; oversized binding fields can corrupt the stack and interrupt service or control execution.

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

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Summary

What happened

Stack-based buffer overflow in Tenda W20E 15.11.0.6 allows remote authenticated users to crash the device or execute code. The formIPMacBindModify handler passes IPMacBindRuleIp, IPMacBindRuleMac, and IPMacBindRuleRemark to unbounded sprintf into a 512-byte stack buffer. Access to the web administration interface and valid credentials are required; oversized binding fields can corrupt the stack and interrupt service or control execution.

The record

CVE
CVE-2023-26805
Published
Mar 19, 2023
Updated
Feb 27, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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
Privilegesauthenticated
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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