Public proof of concept

CVE-2021-25374

A public proof of concept exists; no exploitation attested.

Published2021-04-09
WeaknessCWE-285

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An improper authorization vulnerability in Samsung Members "samsungrewards" scheme for deeplink in versions 2.4.83.9 in Android O(8.1) and below, and 3.9.00.9 in Android P(9.0) and above allows remote attackers to access a user data related with Samsung Account.

Timeline

dates in UTC

2021-04-0918:15CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-25374?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-25374?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Samsung membersversion to verify

Branch	Affected	Fixed in	Source
2.4	≤ 2.4.83.9	no fix published	NVD
3.9+	≥ 3.9.00.9	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

security.samsungmobile.comVendor Advisory
security.samsungmobile.comVendor Advisory

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 1 repository, unverifiedReversecLabs/CVE-2021-25374_Samsung-Account-Access

Sources

CNACVSS 3.18.6read 2026-10-23
NVDCVSS 3.17.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
CNAweakness (CWE)CWE-285read 2026-10-23
FIRST EPSSEPSS score3.1 %2026-10-22
PoC-in-GitHubproof of concept1read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published: 2021-04-09
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-25374?

Is CVE-2021-25374 actively exploited?

Active exploitation of CVE-2021-25374 has not been confirmed. Its EPSS score was 3.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-25374?

CVE-2021-25374 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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