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Vulnerability record · CVE-2025-5623 · published 5 June 2025

CVE-2025-5623: Dlink dir-816 firmware memory buffer overflow vulnerability

Dlink · Dir 816 Firmware

A vulnerability was found in D-Link DIR-816 1.10CNB05. It has been classified as critical. This affects the function qosClassifier of the file /goform/qosClassifier. The manipulation of the argument dip_address/sip_address leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.

9.3 CVSS 4.0 Critical EPSS 19% · top 2.8% CWE-119 · Memory buffer overflowCWE-121 · Stack-based buffer overflow
9.3CVSS 4.0 base score, v2 10.0
19%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A vulnerability was found in D-Link DIR-816 1.10CNB05. It has been classified as critical. This affects the function qosClassifier of the file /goform/qosClassifier. The manipulation of the argument dip_address/sip_address leads to stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer.

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:X/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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/wudipjq/my_vuln/blob/main/D-Link5/vuln_51/51.md ExploitThird Party Advisory
https://vuldb.com/?ctiid.311109 Permissions Required
https://vuldb.com/?id.311109 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.589224 Third Party AdvisoryVDB Entry
https://www.dlink.com/ Product
https://github.com/wudipjq/my_vuln/blob/main/D-Link5/vuln_51/51.md ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2025-45931Dlink dir-816 firmware command injection vulnerabilityAn issue D-Link DIR-816-A2 DIR-816A2_FWv1.10CNB05_R1B011D88210 allows a remote attacker to execute arbitrary code via system() function in the bin/go…EPSS 0.96%9.8CVE-2024-57684Dlink dir-816 firmware incorrect default permissions vulnerabilityAn access control issue in the component formDMZ.cgi of D-Link 816A2_FWv1.10CNB05_R1B011D88210 allows unauthenticated attackers to set the DMZ servic…EPSS 14%9.8CVE-2023-24331Dlink dir-816 firmware command injection vulnerabilityCommand Injection vulnerability in D-Link Dir 816 with firmware version DIR-816_A2_v1.10CNB04 allows attackers to run arbitrary commands via the urlA…EPSS 2.1%9.8CVE-2024-24321Dlink dir-816 firmware command injection vulnerabilityAn issue in Dlink DIR-816A2 v.1.10CNB05 allows a remote attacker to execute arbitrary code via the wizardstep4_ssid_2 parameter in the sub_42DA54 fun…EPSS 1.9%9.8CVE-2023-39637Dlink dir-816 firmware command injection vulnerabilityD-Link DIR-816 A2 1.10 B05 was discovered to contain a command injection vulnerability via the component /goform/Diagnosis.EPSS 2.1%9.8CVE-2022-43002Dlink dir-816 firmware out-of-bounds write vulnerabilityD-Link DIR-816 A2 1.10 B05 was discovered to contain a stack overflow via the wizardstep54_pskpwd parameter at /goform/form2WizardStep54.EPSS 1.2%9.8CVE-2022-43003Dlink dir-816 firmware out-of-bounds write vulnerabilityD-Link DIR-816 A2 1.10 B05 was discovered to contain a stack overflow via the pskValue parameter in the setRepeaterSecurity function.EPSS 1.2%9.8CVE-2022-43000Dlink dir-816 firmware out-of-bounds write vulnerabilityD-Link DIR-816 A2 1.10 B05 was discovered to contain a stack overflow via the wizardstep4_pskpwd parameter at /goform/form2WizardStep4.EPSS 1.2%

Source: NIST National Vulnerability Database (record CVE-2025-5623), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.