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PatchSiren cyber security CVE debrief

CVE-2026-7856 D-Link CVE debrief

A buffer overflow vulnerability was found in D-Link DI-8100 16.07.26A1. The issue affects an unknown part of the file /url_member.asp of the Web Management Interface. Executing a manipulation of the argument Name can lead to buffer overflow. The attack can be launched remotely. Network administrators and security teams should review the CVE record and vendor guidance for affected scope and severity.

Vendor
D-Link
Product
DI-8100
CVSS
HIGH 7.3
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 prioritize patching this vulnerability to prevent potential remote attacks. They should review the CVE record and vendor guidance for affected scope and severity. Vulnerability management and security teams should ensure that compensating controls are in place for exposed systems while remediation is scheduled and verified.

Technical summary

The CVE-2026-7856 vulnerability is a buffer overflow issue in the /url_member.asp file of the D-Link DI-8100 Web Management Interface. The vulnerability has a CVSS score of 7.3 and is classified as HIGH severity. The attack vector is AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. Affected product deployments should be identified and prioritized for patching.

Defensive priority

High priority should be given to patching this vulnerability, as it can be exploited remotely and has a high CVSS score. Compensating controls should be reviewed for exposed systems while remediation is scheduled and verified.

Recommended defensive actions

  • Apply the vendor-provided patch for D-Link DI-8100 16.07.26A1
  • Restrict access to the Web Management Interface
  • Monitor for suspicious activity on the network
  • Perform regular vulnerability scans and inventory checks
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-05-05T20:16:41.500Z and was 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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-7856 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-7856

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

  • CVE-2026-7856 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-7856

    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.