CVE-2021-35309

HIGHNVD 7.57.5—

7.5

An issue discovered in Samsung SyncThru Web Service SPL 5.93 06-09-2014 allows attackers to gain escalated privileges via MITM attacks.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 35.9%
KEV: Not listed

Published

August 22, 2023

Last Modified

November 21, 2024

References (4)

cve@mitrehttps://github.com/mustafa-turgut/cve-subscriptions/tree/main/samsung-stws
cve@mitrehttps://security.samsungmobile.com/securityUpdate.smsb
af854a3a-2127-422b-91ae-364da2661108https://github.com/mustafa-turgut/cve-subscriptions/tree/main/samsung-stws
af854a3a-2127-422b-91ae-364da2661108https://security.samsungmobile.com/securityUpdate.smsb

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-269Improper Privilege Management

Data Freshness Timeline

(refreshed 13× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-05 22:45 UTCepss_batch
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Frequently asked(5)

What is CVE-2021-35309?

CVE-2021-35309 is a high vulnerability published on August 22, 2023. An issue discovered in Samsung SyncThru Web Service SPL 5.93 06-09-2014 allows attackers to gain escalated privileges via MITM attacks.

When was CVE-2021-35309 disclosed?

CVE-2021-35309 was first published in the National Vulnerability Database on August 22, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-35309 actively exploited?

CVE-2021-35309 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 35.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-35309?

CVE-2021-35309 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2021-35309?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-35309, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-35309

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-35309?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)