PatchSiren cyber security CVE debrief

CVE-2026-21042 Samsung Mobile CVE debrief

CVE-2026-21042 is an out-of-bounds write vulnerability in libsavsac.so prior to SMR Jul-2026 Release. The vulnerability allows local attackers to execute arbitrary code. This issue affects Samsung devices and users should be aware of this vulnerability and take steps to ensure their devices are updated to the latest security patch. The vulnerability has a high CVSS score of 8.4 and is considered a high severity issue.

Vendor: Samsung Mobile
Product: Samsung Mobile Devices
CVSS: HIGH 8.4
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-07-10
Original CVE updated: 2026-07-10
Advisory published: 2026-07-10
Advisory updated: 2026-07-10

Who should care

Users of Samsung devices should be aware of this vulnerability and take steps to ensure their devices are updated to the latest security patch. Security teams and administrators responsible for managing Samsung devices should review the CVE record and apply the necessary patches to prevent exploitation.

Technical summary

The vulnerability is caused by an out-of-bounds write in libsavsac.so prior to SMR Jul-2026 Release. This allows local attackers to execute arbitrary code. The affected product is libsavsac.so in Samsung devices prior to SMR Jul-2026 Release. Users should apply the security patch released by Samsung to mitigate this vulnerability.

Defensive priority

High

Recommended defensive actions

Apply the security patch released by Samsung for SMR Jul-2026 Release
Ensure devices are updated to the latest security patch
Monitor devices for suspicious activity

Evidence notes

The CVE record was published on 2026-07-10T05:16:34.797Z and was last modified on 2026-07-10T13:16:19.593Z. The NVD entry is currently being reviewed. Samsung has released a security patch for SMR Jul-2026 Release to address this vulnerability. Users should verify their devices are updated to the latest security patch. The CVE record provides limited detail on affected products and versions.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-10T05:16:34.797Z and has not been modified since then.