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CVE-2022-41080, also referred to as OWASSRF, is a critical vulnerability in Microsoft Exchange Server that can be abused through Outlook Web Access request handling to achieve authenticated server-side request forgery. The flaw arises from Exchange processing of the X-OWA-ExplicitLogonUser header and related explicit logon URL rewriting logic, allowing an attacker to influence the backend target path. By crafting a request so that the frontend rewrites and proxies it to backend Exchange endpoints such as MAPI/NSPI or PowerShell, the attacker can cause the server to issue backend requests in the security context of the authenticated user. This exposes internal Exchange functionality that is not normally reachable remotely and can be used as the first stage of an exploit chain. Public reporting describes the vulnerability as enabling remote privilege escalation on Exchange servers and as a practical precursor to code-execution chains when combined with another Exchange flaw.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
12 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An on-premises Microsoft Exchange vulnerability, part of the OWASSRF exploit chain, used by Storm-1175 to gain initial access by exposing Exchange PowerShell via OWA.
A Microsoft Exchange vulnerability referenced as one of the flaws Play ransomware targets to gain remote code execution and initial access.
A Microsoft Exchange Server privilege escalation vulnerability used as part of the OWASSRF exploit chain to bypass ProxyNotShell mitigations and facilitate compromise of Exchange environments.
An authenticated SSRF vulnerability in Microsoft Exchange OWA that can proxy attacker-controlled requests to backend Exchange endpoints such as /mapi/nspi and /powershell using the victim's authenticated context.
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.