| Title | Microsoft Exchange - Pre-Auth SSRF / ACL Bypass (ProxyNotFound) |
|---|---|
| Author | daffainfo |
| Severity | Critical |
| Impact | Attackers can execute arbitrary code remotely, potentially leading to full system compromise or data breach |
| Remediation | Apply the latest security patches and updates provided by Microsoft for Exchange Server |
| CVSS Score | 9.8 |
| EPSS Score | 0.51067 |
| CVE ID | CVE-2021-28480 |
| CWE ID | D-CWE-noinfo |
| Shodan Query | http.favicon.hash:1768726119http.title:"outlook"cpe:"cpe:2.3:a:microsoft:exchange_server" |
| Fofa Query | title="outlook"icon_hash=1768726119 |
| Tags | cve cve2021 ssrf rce exchange microsoft vkev |
Microsoft Exchange Server contains a remote code execution caused by improper input validation in the server component, letting remote attackers execute arbitrary code, exploit requires network access to the server.
GET /owa/ HTTP/1.1
Host: www.victim.com
User-Agent: Mozilla/5.0 (Fedora; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36
Connection: close
Accept-Encoding: gzip
🔗 Nuclei Template: https://github.com/packetinside/nuclei-templates/blob/main/http/cves/2021/CVE-2021-28481.yaml
🦈 Packet Capture: ⬇️ Download cve-2021-28481.pcap
N/AN/A