Loading vulnerability…
CVE-2026-28321 is a broken access control vulnerability in SolarWinds Serv-U affecting version 15.5.4 HF1 and earlier on Linux and Windows. Weak access checks allow a user with domain administrator privileges in Serv-U to perform arbitrary file read and write operations. On Linux, this access can be leveraged to escalate privileges further and execute code as root. The issue is rated critical and is most severe on Linux deployments, while the impact is lower on Windows installations.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
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.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical broken access control vulnerability in SolarWinds Serv-U that allows arbitrary file read/write and can be leveraged to achieve root-level code execution.
A broken access control vulnerability in SolarWinds Serv-U that can allow arbitrary file read/write, leading to privilege escalation and possible code execution as root.
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.