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CVE-2025-20338 is a local privilege escalation vulnerability in the CLI of Cisco IOS XE Software. The flaw is caused by insufficient validation of user-supplied arguments passed to specific CLI commands. An authenticated local attacker with valid administrative privileges can supply crafted command arguments at the CLI prompt and trigger execution of arbitrary commands on the underlying operating system with root privileges. The issue affects the boundary between the IOS XE CLI and the underlying OS command handling, enabling elevation from administrative device access to full root-level execution on the host system.
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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.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A local privilege escalation vulnerability in Cisco IOS XE devices.
A local privilege escalation vulnerability affecting Cisco IOS XE devices.
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.