Security Resilience

CVE-2023-49007

Memory Safety in Netgear Rbr750 Firmware ≤ 7.2.6.21

Public PoCMemory Safety
Published
08 December 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 0.090 95th percentile
Risk Priority 80 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2023-49007 is a critical-severity Out-of-bounds Write (CWE-787) vulnerability in Netgear Rbr750 Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Security Account Manager (T1003.002); 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.

Deeper analysis AI-assisted summary

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

CVE-2023-49007 is a stack-based buffer overflow vulnerability, tracked under CWE-787, that affects the /usr/sbin/httpd component in Netgear Orbi RBR750 firmware versions prior to V7.2.6.21. The flaw carries a CVSS 3.1 base score of 9.8, reflecting network attack vectors with no required authentication or user interaction.

An unauthenticated remote attacker can send specially crafted HTTP requests to the web server process, triggering the overflow to corrupt the stack and potentially execute arbitrary code with full system privileges on the affected device.

The provided references point to a public GitHub repository containing technical details and proof-of-concept material for the issue; the firmware description indicates that upgrading to version V7.2.6.21 or later addresses the buffer overflow. The associated EPSS score has remained flat at 0.0819 with no material increase observed since disclosure.

EU & UK References

Vulnerability Data

In Netgear Orbi RBR750 firmware before V7.2.6.21, there is a stack-based buffer overflow in /usr/sbin/httpd.

CWE(s)
CWE-787

Related Threats

MITRE ATT&CK Enterprise Techniques

T1003.002 Security Account Manager Credential Access
Adversaries may attempt to extract credential material from the Security Account Manager (SAM) database either through in-memory techniques or through the Windows Registry where the SAM database is stored.
attack.mitre.org →
T1003.004 LSA Secrets Credential Access
Adversaries with SYSTEM access to a host may attempt to access Local Security Authority (LSA) secrets, which can contain a variety of different credential materials, such as credentials for service accounts.
attack.mitre.org →
T1003.008 /etc/passwd and /etc/shadow Credential Access
Adversaries may attempt to dump the contents of <code>/etc/passwd</code> and <code>/etc/shadow</code> to enable offline password cracking.
attack.mitre.org →
T1006 Direct Volume Access Stealth
Adversaries may directly access a volume to bypass file access controls and file system monitoring.
attack.mitre.org →
T1007 System Service Discovery Discovery
Adversaries may try to gather information about registered local system services.
attack.mitre.org →
T1012 Query Registry Discovery
Adversaries may interact with the Windows Registry to gather information about the system, configuration, and installed software.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

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CVE-2023-27369Same vendor: Netgear
CVE-2023-44445Same vendor: Netgear
CVE-2023-27361Same vendor: Netgear
CVE-2023-40478Same vendor: Netgear
CVE-2023-51635Same vendor: Netgear
CVE-2024-12988Same vendor: Netgear
CVE-2025-5934Same vendor: Netgear

Affected Assets

netgear
rbr750 firmware
≤ 7.2.6.21

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.

ID.RA-01 partial match
blocks

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

PR.PS-02 partial match
blocks

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

PR.PS-06 partial match
blocks

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

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.5.14 Information transfer partial match
removes
A.5.15 Access control partial match
removes
A.5.16 Identity management partial match
removes
A.5.17 Authentication information partial match
removes
A.5.18 Access rights partial match
removes
A.7.2 Physical entry partial match
removes

References