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CVE-2026-4183· NVD / CVE Program· CNA VulDB

D-Link DIR-816 goahead form2WlanBasicSetup.cgi stack-based overflow

A security vulnerability has been detected in D-Link DIR-816 1.10CNB05. Affected is an unknown function of the file /goform/form2WlanBasicSetup.cgi of the component goahead. Such manipulation of the argument pskValue leads to stack-based buffer overflow. The attack can be executed remotely. The exploit has been disclosed publicly and may be used. This vulnerability only affects products that are no longer supported by the maintainer.

HighCVSS 8.9 · v4.0—No exploit No fix recorded
Published
Mar 16, 2026
Updated
Jun 17, 2026
EPSS
1.9% · 79th percentile
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Report tools

JSON

Action score

36

Monitor

Low priority for now.

CVSS
35 / 40 · 8.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 1.9%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · VulDB
9.3
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Affected systems

VendorProduct
dlinkdir-816 firmware
dlinkdir-816

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • dlink dir-816 firmware1.10cnb05

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulDB). Independent of NVD's CPE analysis and usually ahead of it.

  • D-Link DIR-816

    • 1.10CNB05affected

Same product

dlink: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-37130In D-Link DIR-816 A2_v1.10CNB04, DIR-878 DIR_878_FW1.30B08.img a command injection vulnerability occurs in /goform/Diagnosis, after the cond
    47Plan
  • CVE-2022-37128In D-Link DIR-816 A2_v1.10CNB04.img the network can be initialized without authentication via /goform/wizard_end.
    46Plan
  • CVE-2022-37134D-link DIR-816 A2_v1.10CNB04.img is vulnerable to Buffer Overflow via /goform/form2Wan.cgi.
    46Plan
  • CVE-2021-27114An issue was discovered in D-Link DIR-816 A2 1.10 B05 devices.
    46Plan
  • CVE-2022-29322D-Link DIR-816 A2_v1.10CNB04 was discovered to contain a stack overflow via the IPADDR and nvmacaddr parameters in /goform/form2Dhcpip.
    44Plan
  • CVE-2025-5623D-Link DIR-816 qosClassifier stack-based overflow
    43Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days+1% in 7 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2025-5623285 days apartD-Link DIR-816 qosClassifier stack-based overflow
    43Plan
  • CVE-2025-5622285 days apartD-Link DIR-816 wirelessApcli_5g stack-based overflow
    38Monitor
  • CVE-2025-5624285 days apartD-Link DIR-816 QoSPortSetup stack-based overflow
    38Monitor
  • CVE-2025-5630285 days apartD-Link DIR-816 form2lansetup.cgi stack-based overflow
    38Monitor
  • CVE-2026-41810 days apartD-Link DIR-816 goahead form2RepeaterStep2.cgi stack-based overflow
    36Monitor
  • CVE-2026-41840 days apartD-Link DIR-816 goahead form2Wl5BasicSetup.cgi stack-based overflow
    36Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
X

Weakness class (CWE)

CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records