Cyber Resilience

CVE-2023-49043

Memory Safety in Tenda Ax1803 Firmware 1.0.0.1

Public PoCMemory Safety
Published
27 November 2023
Modified
21 November 2024
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 0.13 96th percentile
Risk Priority 87 floored blend · peak EPSS

Summary

CVE-2023-49043 is a critical-severity Out-of-bounds Write (CWE-787) vulnerability in Tenda Ax1803 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 4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

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 Tenda AX1803 firmware version 1.0.0.1 within the fromSetWirelessRepeat function, triggered by the wpapsk_crypto parameter and tracked as CWE-787. The flaw received a CVSS 3.1 base score of 9.8, reflecting network-accessible attack conditions that require no authentication or user interaction.

Unauthenticated remote attackers can send a crafted request to the affected wireless configuration endpoint, causing memory corruption that permits arbitrary code execution with full control over the device confidentiality, integrity, and availability.

Public references consist of technical write-ups and proof-of-concept material hosted on GitHub; no vendor advisory or firmware patch information is included in the supplied references. The associated EPSS score has remained stable at 0.3261 with no material upward trajectory observed after disclosure.

EU & UK References

Vulnerability Data

Buffer Overflow vulnerability in Tenda AX1803 v.1.0.0.1 allows a remote attacker to execute arbitrary code via the wpapsk_crypto parameter in the function fromSetWirelessRepeat.

CWE(s)
CWE-787

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 →
T1211 Exploitation for Stealth Stealth
Adversaries may exploit vulnerabilities to evade detection by hiding activity, suppressing logging, or operating within trusted or unmonitored components.
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-2023-49042Same product: Tenda Ax1803
CVE-2023-49044Same product: Tenda Ax1803
CVE-2023-49047Same product: Tenda Ax1803
CVE-2023-51956Same product: Tenda Ax1803
CVE-2023-51953Same product: Tenda Ax1803
CVE-2023-51954Same product: Tenda Ax1803
CVE-2023-51966Same product: Tenda Ax1803
CVE-2023-51963Same product: Tenda Ax1803
CVE-2023-51969Same product: Tenda Ax1803
CVE-2023-51957Same product: Tenda Ax1803

Affected Assets

tenda
ax1803 firmware
1.0.0.1

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-16 Memory Protection
addresses: CWE-787

Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.

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 (static analysis, bounds checking, code review) are the primary means of preventing out-of-bounds writes.

ID.RA-01 partial match
prevents

Vulnerability scanning and recording can discover out-of-bounds write flaws so they can be remediated.

PR.PS-02 partial match
prevents

Patching or replacing vulnerable software directly eliminates known instances of this coding weakness.

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 in development and acceptance can detect and prevent out-of-bounds write defects.

A.8.25 Secure development life cycle partial match
prevents

Secure development life cycle mandates practices that prevent out-of-bounds writes.

A.8.26 Application security requirements partial match
prevents

Application security requirements can specify bounds-checking and safe memory handling.

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

Secure architecture and engineering principles reduce the likelihood of buffer overflows.

A.8.28 Secure coding partial match
prevents

Secure coding directly addresses out-of-bounds writes through language choice and coding standards.

A.8.32 Change management partial match
prevents

Change management can enforce review gates that catch unsafe memory operations before deployment.

References