Cyber Resilience

CVE-2023-50991

Memory Safety in Tenda I29 Firmware 1.0.0.2 … 1.0.0.5

Public PoCMemory Safety
Published
05 January 2024
Modified
13 June 2025
CVSS Score v3.1 7.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.088 95th percentile
Risk Priority 67 floored blend · peak EPSS

Summary

CVE-2023-50991 is a high-severity Classic Buffer Overflow (CWE-120) vulnerability in Tenda I29 Firmware. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked in the top 5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

A buffer overflow vulnerability exists in the pingSet function of Tenda i29 wireless access point firmware versions 1.0 V1.0.0.5 and 1.0 V1.0.0.2. The flaw is triggered when the pingIp parameter is processed, allowing an attacker to supply crafted input that exceeds expected buffer bounds and results in a denial of service. The issue is tracked as CWE-120 and carries a CVSS 3.1 score of 7.5 reflecting network attack vector, low complexity, and high availability impact with no confidentiality or integrity consequences.

Remote unauthenticated attackers can exploit the vulnerability by sending a malicious HTTP request containing an oversized pingIp value directly to the device's web management interface. Successful exploitation causes the affected process to crash, producing a denial-of-service condition that disrupts device operation until a manual or automatic restart occurs.

Public technical details and proof-of-concept material are available in a GitHub repository that documents the pingSet parameter handling flaw, although no vendor advisory or firmware patch has been referenced in the supplied sources. The associated EPSS score has remained flat at 0.1294 with no material increase since disclosure.

EU & UK References

Vulnerability Data

Buffer Overflow vulnerability in Tenda i29 versions 1.0 V1.0.0.5 and 1.0 V1.0.0.2, allows remote attackers to cause a denial of service (DoS) via the pingIp parameter in the pingSet function.

CWE(s)
CWE-120

Related Threats

MITRE ATT&CK Enterprise Techniques

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
T1210 Exploitation of Remote Services Lateral Movement
Adversaries may exploit remote services to gain unauthorized access to internal systems once inside of a network.
attack.mitre.org →
T1212 Exploitation for Credential Access Credential Access
Adversaries may exploit software vulnerabilities in an attempt to collect credentials.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-50986Same product: Tenda I29
CVE-2023-50987Same product: Tenda I29
CVE-2023-50984Same product: Tenda I29
CVE-2023-50988Same product: Tenda I29
CVE-2023-50992Same product: Tenda I29
CVE-2023-50985Same product: Tenda I29
CVE-2023-50990Same product: Tenda I29
CVE-2023-50989Same product: Tenda I29
CVE-2023-50983Same product: Tenda I29
CVE-2023-27061Same vendor: Tenda

Affected Assets

tenda
i29 firmware
1.0.0.2, 1.0.0.5

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V5.2.1

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match

Developer testing and analysis can find missing size checks before deployment.

SI-10 Information Input Validation good match

Input validation directly enforces size checks before buffer copies.

SA-8 Security and Privacy Engineering Principles partial match

Engineering principles require bounds checking and safe buffer handling in design.

SI-16 Memory Protection partial match

Memory protection limits the impact of an overflow once it occurs.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure development practices directly enforce bounds checking and input validation that prevent classic buffer overflows.

ID.RA-01 partial match
prevents

Vulnerability identification processes such as code review or scanning detect classic buffer overflows before exploitation.

PR.PS-02 partial match
prevents

Routine patching replaces vulnerable code containing unchecked buffer copies with corrected versions.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.28 Secure coding mostly match
prevents

Secure coding directly requires bounds-checked memory operations, addressing the root cause of CWE-120.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development and acceptance can detect buffer overflows through fuzzing and static analysis, though it does not prevent them at the source.

A.8.25 Secure development life cycle partial match
prevents

Secure development life cycle mandates processes that can include input validation and bounds checking to prevent buffer overflows.

A.8.26 Application security requirements partial match
prevents

Application security requirements can specify input-size validation and safe buffer handling to mitigate classic buffer overflows.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure system architecture and engineering principles promote defensive coding patterns that reduce the likelihood of unchecked buffer copies.

References