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CVE-2026-20272 is a critical vulnerability record for Cisco IOS XE Software that covers multiple internally discovered injection-related issues addressed through a software hardening release. The weakness class is mapped to CWE-74, improper neutralization of special elements, and Cisco characterizes the issue as encompassing command injection, operating system injection, and argument injection conditions. The affected software includes Cisco IOS XE running in autonomous mode or controller mode across multiple release trains. Available reporting indicates that a remote attacker can exploit the flaw over the network without authentication and without user interaction to cause the device to process attacker-controlled input in an unsafe manner, resulting in arbitrary command execution on the underlying operating 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.
20 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical Cisco IOS XE command/OS/argument injection vulnerability with CVSS 9.8, identified through Cisco internal security testing.
A critical vulnerability in Cisco IOS XE that could allow attackers to bypass authentication and execute arbitrary commands.
A critical command injection vulnerability affecting Cisco IOS XE Software.
A critical command/OS/argument-injection vulnerability group affecting Cisco IOS XE, referenced as part of Cisco's August advisory batch.
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.