Cyber Resilience

CVE-2025-29135

Memory Safety in Tenda Ac7 Firmware 15.03.06.44

Public PoCMemory Safety
Published
24 March 2025
Modified
01 April 2025
CVSS Score v3.1 9.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.010 60th percentile
Risk Priority 74 floored blend · peak EPSS

Summary

CVE-2025-29135 is a critical-severity Stack-based Buffer Overflow (CWE-121) vulnerability in Tenda Ac7 Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked in the top 40% 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 stack-based buffer overflow vulnerability, tracked as CVE-2025-29135 and assigned CWE-121, affects the Tenda AC7 wireless router running firmware version V15.03.06.44. The flaw resides in the formWifiBasicSet function, where the security parameter is processed without adequate bounds checking, enabling a stack overflow condition that can lead to arbitrary code execution. The issue carries a CVSS 3.1 base score of 9.8, reflecting network-accessible attack complexity that is low and requires no authentication or user interaction.

Remote attackers can exploit the vulnerability by sending a crafted HTTP request containing an oversized security parameter to the router's web management interface. Successful exploitation grants the attacker the ability to execute arbitrary code with full read, write, and control privileges over the device, resulting in complete compromise of confidentiality, integrity, and availability.

Public references consist of technical write-ups and proof-of-concept material hosted on GitHub that detail the buffer overflow mechanics but contain no vendor advisory, patch information, or mitigation guidance. The associated EPSS score remains low, with a current value of 0.0080 and a recorded peak of 0.0155, indicating limited observed exploitation interest to date.

EU & UK References

Vulnerability Data

A stack-based buffer overflow vulnerability in Tenda AC7 V15.03.06.44 allows a remote attacker to execute arbitrary code through a stack overflow attack using the security parameter of the formWifiBasicSet function.

CWE(s)
CWE-121

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-2026-51843Same product: Tenda Ac7
CVE-2026-51845Same product: Tenda Ac7
CVE-2026-51844Same product: Tenda Ac7
CVE-2026-51846Same product: Tenda Ac7
CVE-2025-11524Same product: Tenda Ac7
CVE-2025-11586Same product: Tenda Ac7
CVE-2025-8017Same product: Tenda Ac7
CVE-2025-11525Same product: Tenda Ac7
CVE-2025-11528Same product: Tenda Ac7
CVE-2025-11527Same product: Tenda Ac7

Affected Assets

tenda
ac7 firmware
15.03.06.44

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)
  • 2 hardening rules · 2 OS baselines
Validate
Prove the fix (OWASP ASVS)

—

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match

Developer testing and analysis can discover stack-buffer overflows before deployment.

SI-10 Information Input Validation good match

Input validation directly stops untrusted data from exceeding stack buffer bounds.

SI-16 Memory Protection good match

Memory-protection mechanisms limit the ability to execute injected code after a stack overflow.

SA-8 Security and Privacy Engineering Principles partial match

Secure-engineering principles include bounds-checked coding and safe buffer handling that avoid introducing the flaw.

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 prevent introduction of stack buffer overflows.

ID.RA-01 partial match
prevents

Vulnerability scanning can discover stack buffer overflows but does not prevent their introduction.

PR.PS-02 partial match
prevents

Patching eliminates known instances of the weakness after discovery.

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.8.29 Security testing in development and acceptance mostly match
finds

Security testing (fuzzing, static analysis) detects stack overflows before release.

A.8.25 Secure development life cycle partial match
prevents

Secure SDLC mandates buffer-safety practices that directly prevent stack overflows.

A.8.26 Application security requirements partial match
prevents

Application security requirements can specify buffer-size and input-validation rules.

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

Secure architecture principles include memory-safety and least-privilege stack usage.

A.8.28 Secure coding partial match
prevents

Secure coding standards explicitly forbid unsafe buffer handling that causes CWE-121.

A.8.32 Change management none match
none

Change-management gates can enforce security reviews that catch buffer issues.

Hardening callouts derived

Configuration rules from DISA STIG baselines that bear on weaknesses of the type cited by this CVE. Each rule is shown with the relationship its mapping actually records, against the CWE it was authored against. Derived via CVE→CWE over `controls_xwalks` (authoritative rows only; rows rated `none` are excluded).

Oracle Linux 8 (1 rule)
  • V-248594 OL 8 must implement address space layout randomization (ASLR) to protect its memory from unauthorized code execution. prevents CWE-121
Oracle Linux 9 (1 rule)
  • V-271452 OL 9 must use a Linux Security Module configured to enforce limits on system services. prevents CWE-121

References