Cyber Resilience

CVE-2023-34563

Memory Safety in Netgear R6250 Firmware 1.0.4.48

Public PoCMemory Safety
Published
20 June 2023
Modified
09 December 2024
Patch / advisory
View advisory
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 0.14 96th percentile
Risk Priority 83 floored blend · peak EPSS

Summary

CVE-2023-34563 is a critical-severity Classic Buffer Overflow (CWE-120) vulnerability in Netgear R6250 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.

Netgear R6250 firmware version 1.0.4.48 contains a buffer overflow vulnerability (CWE-120) that occurs after authentication. The issue is rated 9.8 under CVSS 3.1 with a vector of AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, reflecting the potential for complete loss of confidentiality, integrity, and availability on the affected device.

Remote attackers can trigger the overflow to achieve arbitrary code execution or denial of service. The provided EPSS values are 0.1778 currently and 0.1852 at peak, indicating moderate and relatively stable exploitation probability since disclosure.

Netgear's security advisories page and associated technical write-ups on GitHub outline vendor guidance for the R6250, including any available firmware updates or configuration changes to address the flaw. No information on observed in-the-wild exploitation is supplied.

EU & UK References

Vulnerability Data

netgear R6250 Firmware Version 1.0.4.48 is vulnerable to Buffer Overflow after authentication.

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-2023-33532Same product: Netgear R6250
CVE-2024-50995Same vendor: Netgear
CVE-2024-51003Same vendor: Netgear
CVE-2024-52025Same vendor: Netgear
CVE-2025-29044Same vendor: Netgear
CVE-2024-50994Same vendor: Netgear
CVE-2024-52015Same vendor: Netgear
CVE-2024-51012Same vendor: Netgear
CVE-2024-52013Same vendor: Netgear
CVE-2024-51007Same vendor: Netgear

Affected Assets

netgear
r6250 firmware
1.0.4.48

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

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.

SC-27 Platform-independent Applications
addresses: CWE-120

Platform-independent managed code eliminates the need for unchecked native buffer copies that are the root cause of classic buffer overflows.

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