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CVE-2026-21279 is an improper input validation vulnerability in Adobe ColdFusion. The flaw arises from insufficient validation of input bounds, which can place the application into unexpected execution states and allow security controls to be bypassed. Successful exploitation does not require user interaction. The vulnerability affects ColdFusion 2025.0.11 and earlier and ColdFusion 2023.0.22 and earlier. Exploitation can allow an attacker to circumvent intended security protections and obtain unauthorized read access together with limited write access.
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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.
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.