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CVE-2026-50054 is an authorization vulnerability in Zimbra Collaboration Suite affecting mailbox delegation functionality. The issue was addressed in Zimbra Collaboration Suite 10.1.20. Publicly available information identifies the flaw only at a high level as an authorization issue in mailbox delegation, without disclosing the specific vulnerable code path, affected function, or exploitation sequence. The vulnerability indicates that mailbox delegation operations were not properly constrained by authorization checks, creating a condition in which delegation-related actions could be performed outside intended permissions.
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No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An authorization vulnerability in Zimbra mailbox delegation.
An authorization vulnerability affecting mailbox delegation in Zimbra.
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.