Loading vulnerability…
CVE-2026-21003 is an improper input validation vulnerability in Samsung products, affecting data related to network restrictions prior to Samsung Security Maintenance Release (SMR) April 2026 Release 1. The flaw allows malformed or otherwise improperly validated input associated with network restriction handling to bypass intended restriction logic. Based on the available information, exploitation requires physical access and results in circumvention of security controls rather than direct code execution.
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.
1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository is a small proof-of-concept/demo exploit for a JWT authentication bypass labeled CVE-2026-21003. It contains two code files: a vulnerable Node.js Express server (jwt_verify_server.js) and a Python exploit client (exploit_jwt_none.py), plus a README and license. The server exposes POST /verify and decodes JWTs before verification; if the JWT header lacks alg or explicitly uses 'none', it skips signature verification and authenticates the supplied subject. Otherwise it attempts RS256 verification with an embedded public key. The Python exploit uses PyJWT to generate an unsigned token with subject 'admin' and sends it to http://localhost:3000/verify using requests, demonstrating impersonation. The repository's purpose is to illustrate an authentication bypass caused by improper JWT algorithm enforcement rather than provide a generalized exploitation framework. It is an actual exploit/demo, not merely detection logic, but it is limited and hardcoded to the local demo target.
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.
1 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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.