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PatchSiren cyber security CVE debrief

CVE-2025-50645 D-Link CVE debrief

A high-severity buffer overflow vulnerability was discovered in D-Link DI-8003 16.07.26A1. The vulnerability occurs when the 's' parameter in the 'pppoe_list_opt.asp' endpoint is manipulated. By sending a crafted request with an excessively large value for the 's' parameter, an attacker can trigger a buffer overflow condition. This vulnerability has significant implications for organizations using the affected product, as it could allow attackers to execute arbitrary code or cause a denial of service. The CVSS score of 7.5 indicates a high level of severity, emphasizing the need for prompt patching and mitigation.

Vendor
D-Link
Product
DI-8003
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-08
Original CVE updated
2026-07-25
Advisory published
2026-04-08
Advisory updated
2026-07-25

Who should care

Organizations using D-Link DI-8003 16.07.26A1 should prioritize patching this vulnerability to prevent potential attacks. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity.

Technical summary

The vulnerability is caused by improper handling of user input in the 'pppoe_list_opt.asp' endpoint. An attacker can exploit this vulnerability by sending a crafted request with a large value for the 's' parameter, leading to a buffer overflow condition. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. This vulnerability affects D-Link DI-8003 16.07.26A1 and may allow attackers to execute arbitrary code or cause a denial of service. Defensive measures should focus on patching the vulnerability, implementing network segmentation, and monitoring network traffic for suspicious activity.

Defensive priority

High priority should be given to patching this vulnerability, as it has a high CVSS score and can be exploited remotely. Organizations should review their current network architecture and implement compensating controls to limit potential damage in case of an attack. Monitoring network traffic for suspicious activity and performing regular vulnerability scans are also recommended. Implementing a web application firewall (WAF) may help detect and prevent attacks. Additionally, consider isolating affected systems and restricting access to sensitive areas of the network until a patch is applied. Review and update incident response plans to include procedures for handling potential exploitation of this vulnerability. Ensure that security teams are aware of the vulnerability and its potential impact on the organization. Consider conducting a thorough risk assessment to identify potential vulnerabilities and prioritize remediation efforts.

Recommended defensive actions

  • Apply the vendor-provided patch or update to a fixed version of the firmware.
  • Implement network segmentation to limit the attack surface.
  • Monitor network traffic for suspicious activity.
  • Perform regular vulnerability scans and penetration testing.
  • Consider implementing a web application firewall (WAF) to detect and prevent attacks.

Evidence notes

The vulnerability was discovered in D-Link DI-8003 16.07.26A1. The CVE record was published on 2026-04-08T19:24:15.227Z and last modified on 2026-07-25T10:10:00.167Z. The NVD entry is currently Modified. Evidence of the vulnerability's existence is limited to the provided CVE and NVD information. Defenders should verify the affected product scope and review the official advisory for mitigation guidance.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-04-08T19:24:15.227Z and has not been modified since then. The NVD entry is currently Modified.