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PatchSiren cyber security CVE debrief

CVE-2026-7855 D-Link CVE debrief

A buffer overflow vulnerability was detected in D-Link DI-8100 16.07.26A1, specifically in the tggl_asp function of the /tggl.asp file within the HTTP Request Handler component. The vulnerability is triggered by manipulating the Name argument, leading to a buffer overflow. This issue can be exploited remotely, potentially allowing attackers to execute arbitrary code or disrupt service. Network administrators and security teams should review the official advisory and assess their exposure.

Vendor
D-Link
Product
DI-8100
CVSS
HIGH 7.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-05
Original CVE updated
2026-07-24
Advisory published
2026-05-05
Advisory updated
2026-07-24

Who should care

Network administrators and security teams responsible for D-Link DI-8100 devices should be aware of this vulnerability and take immediate action to mitigate the risk. This includes reviewing network configurations, applying patches or updates, and monitoring for suspicious activity. Additionally, security teams should consider implementing compensating controls, such as Web Application Firewalls (WAFs), to help protect against potential attacks.

Technical summary

The CVE-2026-7855 vulnerability affects D-Link DI-8100 16.07.26A1 and is caused by a buffer overflow in the tggl_asp function of the /tggl.asp file. The vulnerability has a CVSS score of 7.4 and is classified as HIGH severity. The attack vector is network-based, and the exploit is publicly available. Successful exploitation could allow an attacker to execute arbitrary code or cause a denial of service.

Defensive priority

High priority should be given to patching or mitigating this vulnerability, as it can be exploited remotely and has a high CVSS score. Defenders should focus on applying vendor-provided patches or updates, implementing network segmentation, and monitoring for suspicious activity.

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 compensating controls, such as Web Application Firewalls (WAFs).
  • Review and update incident response plans to address potential exploitation.
  • Conduct a thorough risk assessment to identify and prioritize affected assets.

Evidence notes

The CVE record was published on 2026-05-05T19:16:23.710Z and last modified on 2026-07-24T08:10:00.150Z. The NVD entry is currently Analyzed. The vulnerability affects D-Link DI-8100 16.07.26A1 devices. Evidence is limited to public sources and may not reflect the full scope or impact of the vulnerability. Defenders should verify affected deployments and review official advisories for specific guidance.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-7855 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-7855

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-7855 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-7855

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.