Samsung Device up to SMR Jan-2021 Release 1 SAC libsavsac.so out-of-bounds write

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.4$0-$5k1.81

Summaryinfo

A vulnerability marked as very critical has been reported in Samsung Device. Affected is an unknown function of the file libsavsac.so of the component SAC Handler. Performing a manipulation results in out-of-bounds write. This vulnerability is cataloged as CVE-2026-21042. The attack must be initiated from a local position. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as very critical, was found in Samsung Device. This affects an unknown code of the file libsavsac.so of the component SAC Handler. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Out-of-bounds write in libsavsac.so prior to SMR Jul-2026 Release 1 allows local attackers to execute arbitrary code.

The advisory is shared at security.samsungmobile.com. This vulnerability is uniquely identified as CVE-2026-21042 since 12/11/2025. The exploitability is told to be easy. An attack has to be approached locally. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/10/2026).

Upgrading to version SMR Jul-2026 Release 1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-2275). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Samsung Android

Productinfo

Vendor

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.4

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Upgrade: Device SMR Jul-2026 Release 1

Timelineinfo

12/11/2025 CVE reserved
07/10/2026 +210 days Advisory disclosed
07/10/2026 +0 days VulDB entry created
07/10/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: samsung.com

Advisory: security.samsungmobile.com
Status: Confirmed

CVE: CVE-2026-21042 (🔒)
GCVE (CVE): GCVE-0-2026-21042
GCVE (VulDB): GCVE-100-377409
CERT Bund: WID-SEC-2026-2275 - Samsung Android: Mehrere Schwachstellen

Entryinfo

Created: 07/10/2026 08:10
Updated: 07/10/2026 15:26
Changes: 07/10/2026 08:10 (20), 07/10/2026 08:29 (35), 07/10/2026 15:26 (7)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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