CVE-2025-70246
Published: 10 March 2026
Summary
CVE-2025-70246 is a high-severity Stack-based Buffer Overflow (CWE-121) vulnerability in Dlink Dir-513 Firmware. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 26.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-16 (Memory Protection).
Deeper analysis
CVE-2025-70246 is a stack buffer overflow vulnerability (CWE-121) affecting the D-Link DIR-513 router in version 1.10. The issue arises in the handling of the curTime parameter sent to the goform/formVirtualServ endpoint, which can lead to a buffer overflow condition when processing malformed input.
Remote attackers require no authentication or user interaction to exploit this vulnerability over the network with low complexity, as indicated by its CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Successful exploitation results in high-impact availability disruption, such as device crashes or reboots, enabling denial-of-service attacks without affecting confidentiality or integrity.
Mitigation details and advisories are available through D-Link's security bulletin at https://www.dlink.com/en/security-bulletin/, product support page for DIR-513 at https://www.dlink.com.cn/techsupport/ProductInfo.aspx?m=DIR-513, and a related CVE report on GitHub at https://github.com/akuma-QAQ/CVEreport/tree/main/D-link/CVE-2025-70246.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-208523
Vulnerability details
Stack buffer overflow vulnerability in D-Link DIR-513 v1.10 via the curTime parameter to goform/formVirtualServ.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Unauthenticated remote stack buffer overflow in exposed router web endpoint (goform/formVirtualServ) directly enables exploitation of a public-facing network device application, resulting in DoS via crashes/reboots.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
SI-2 Flaw Remediation requires identifying, reporting, and correcting the stack buffer overflow in the goform/formVirtualServ endpoint via timely patching as per D-Link advisories.
SI-10 Information Input Validation directly prevents exploitation by enforcing bounds checking and validation of the malformed curTime parameter.
SI-16 Memory Protection implements stack canaries and other safeguards to block successful stack buffer overflow exploitation leading to crashes.