Remote Code Execution in Microsoft Exchange Server
CVE-2021-31206 is a Microsoft Exchange Server remote code execution vulnerability. Microsoft classified it as Important and assigned CVSS v3.0 scores reported as 7.6 and 7.1, with vector AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:L. Based on the provided content, exploitation is network-based, requires no prior privileges, and does require user interaction. The issue was identified as one of the Exchange Server vulnerabilities found during the 2021 Pwn2Own contest. The specific vulnerable component or function is not identified in the provided material.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Microsoft Exchange Server remote code execution vulnerability addressed in Microsoft's July updates.
A remote code execution vulnerability in Microsoft Exchange Server rated Important, with functional exploit code available and an official fix provided by Microsoft.
Vulnérabilité d’exécution de code à distance affectant Microsoft Exchange, citée comme exploitée ou tentée d’être exploitée via des modes opératoires liés à la Russie.
A Microsoft Exchange vulnerability referenced as part of a ProxyShell exploit toolset downloaded by UNC3569.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.