Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2023-44839 is a high-severity Classic Buffer Overflow (CWE-120) vulnerability in Dlink Dir-823G Firmware. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique NTDS (T1003.003); 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.
D-Link DIR-823G firmware version A1V1.0.2B05 contains a buffer overflow vulnerability in the SetWLanRadioSecurity function triggered by the Encryption parameter. The flaw is tracked as CVE-2023-44839, carries a CVSS 3.1 score of 7.5, and is classified under CWE-120. Successful exploitation results in a denial-of-service condition that disrupts wireless radio security handling.
An unauthenticated attacker with network access can submit a crafted HTTP request containing an oversized or malformed Encryption value to the affected function. Because the device performs no authentication or input-length validation before copying the parameter into a fixed-size buffer, the overflow corrupts memory and forces the device to reboot or become unresponsive.
Public references point to a D-Link security bulletin page and a GitHub repository that reproduces the crash, but neither source supplies a firmware update or configuration workaround at the time of disclosure.
The CVE’s EPSS score rose from a low baseline to a peak of 0.1471 before settling at the current value of 0.1117, indicating measurable post-disclosure exploitation interest that warrants renewed monitoring.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-49162
Vulnerability Data
D-Link DIR-823G A1V1.0.2B05 was discovered to contain a buffer overflow via the Encryption parameter in the SetWLanRadioSecurity function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted input.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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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.
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.
Vulnerability identification processes such as code review or scanning detect classic buffer overflows before exploitation.
Routine patching replaces vulnerable code containing unchecked buffer copies with corrected versions.
Secure development practices directly enforce bounds checking and input validation that prevent classic buffer overflows.
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.