Loading vulnerability…
CVE-2026-20267 is a critical Cisco IOS XE Software vulnerability record that covers multiple internally discovered improper access control issues addressed through software hardening releases. The weaknesses are classified under CWE-284 and affect numerous Cisco IOS XE release trains. Cisco characterizes the issue set as remotely exploitable, with no privileges required and no user interaction required, although the attack complexity is high. The CVSS v3.1 vector indicates changed scope and high impact to confidentiality, integrity, and availability, consistent with access control failures that can permit unauthorized access to protected functionality or resources across trust boundaries.
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.
9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity improper access control vulnerability in Cisco IOS XE Software that could allow access beyond intended permissions.
A critical Cisco IOS XE Software improper access control vulnerability that could enable access beyond intended permissions.
A critical Cisco IOS XE improper access control vulnerability.
An improper access control vulnerability in Cisco IOS XE Software.
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.