CVE-2026-42893

Description

Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to perform tampering over a network.

CVSS Details

CVSS Score

7.4

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

cpe:2.3:a:microsoft:outlook:*:*:*:*:*:iphone_os:*:* - VULNERABLE

M365 Copilot (具体受影响版本请参考厂商通告)

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

# Conceptual PoC for CVE-2026-42893
import requests

def check_vulnerability(target):
    url = f"{target}/api/copilot/execute"
    headers = {"Content-Type": "application/json"}
    # Payload attempting command injection
    data = {"query": "normal text ; malicious_command"}
    try:
        r = requests.post(url, json=data, headers=headers)
        if "root" in r.text or r.status_code == 200:
            return "Potential vulnerability detected"
    except Exception as e:
        return str(e)

print(check_vulnerability("https://target-domain.com"))

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-42893
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-42893
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-42893/
[4] VulDB https://vuldb.com/cve/CVE-2026-42893
[5] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42893

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-42893", "sourceIdentifier": "[email protected]", "published": "2026-05-12T18:17:26.343", "lastModified": "2026-05-13T18:37:09.340", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthorized attacker to perform tampering 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:R/S:C/C:N/I:H/A:N", "baseScore": 7.4, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 4.0}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-77"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:microsoft:outlook:*:*:*:*:*:iphone_os:*:*", "versionEndExcluding": "5.2617.1", "matchCriteriaId": "D8872A3D-4409-4562-9E09-7B2664731C83"}]}]}], "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42893", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}