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CVE-2025-21079 is an improper input validation vulnerability in Samsung Members prior to version 5.5.01.3. The flaw allows a remote attacker to supply crafted input that causes the application to connect to an arbitrary URL and launch an arbitrary Android activity with Samsung Members privileges. In demonstrated exploitation, the issue was used as the initial pivot in a multi-application exploit chain on Samsung Galaxy devices: after a victim clicked a malicious link, Samsung Members was coerced into loading attacker-controlled web content and then invoking another privileged Samsung application. The vulnerability is rooted in insufficient validation of externally influenced input governing URL handling and activity invocation within Samsung Members.
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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.
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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.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability in Samsung Members used as the first step in an exploit chain to force the app to open a malicious website, enabling initial access on Samsung Galaxy devices.
A vulnerability in the Samsung Members application that can be exploited after a user clicks a malicious link, causing the app to connect to an attacker-controlled website as the first stage of an exploit chain against Samsung phones.
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.