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CVE-2025-3928 is a vulnerability in Commvault Web Server that allows a remote, authenticated attacker to create and execute web shells, compromising the web server. The underlying weakness and vulnerable function are unspecified. The vulnerability affects Windows and Linux deployments and was fixed in releases 11.36.46, 11.32.89, 11.28.141, and 11.20.217. Exploitation has been associated with compromises involving Commvault cloud infrastructure and customer Microsoft 365 environments. It was added to the CISA Known Exploited Vulnerabilities Catalog on April 28, 2025.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
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.
46 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Commvault vulnerability exploited as a zero-day to breach Commvault's Azure environment (nation-state attributed).
An (as-described) unspecified vulnerability in Commvault Web Server that was initially reported as exploited by Silk Typhoon for SaaS/trusted-relationship compromise leading to downstream customer access (including Microsoft 365 account compromise), but the specific reference was later removed from CrowdStrike’s post per the article.
A known security flaw in Commvault that Murky Panda is reported to exploit as an infection/initial access pathway.
A vulnerability affecting Commvault’s backup platform that Murky Panda (Silk Typhoon) has leveraged for initial access.
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.