7.5

CVE-2021-0341: google android Improper Certificate Validation

Modified
AliasesCGA-2j5h-c5gr-6mwrCGA-39j2-4gmh-rghqCGA-4hhm-73m5-hq78
Published 10-02-2021Last modified 03-08-2024

Vulnerability summary

CVE-2021-0341 is a high (CVSS 7.5) Improper Certificate Validation vulnerability in google android. EPSS estimates a 0.88% chance of exploitation in the next 30 days, higher than 59% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.88%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 1
RHSA-2023:2705RHSA-2023:2706RHSA-2023:2707CGA-X4GJ-XX3X-2HP8

Timeline

  1. 10-02-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

In verifyHostName of OkHostnameVerifier.java, there is a possible way to accept a certificate for the wrong domain due to improperly used crypto. This could lead to remote information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-8.1 Android-9 Android-10 Android-11Android ID: A-171980069

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.88%

Chance of exploitation in the next 30 days

Percentile

59%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.87% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard11 products
  • hadoop-fips-3.4.2All versions (No fix recorded)
  • hadoop-fips-3.5All versions (No fix recorded)
  • knative-kafka-broker-1.17-dispatcher-loom< 1.17.3-r2
  • knative-kafka-broker-1.17-receiver-loom< 1.17.3-r2
  • s3proxy< 3.3.0-r1
Com.squareup.okhttp31 product
  • okhttp< 4.9.2
Google1 product

3 vendors · 13 products

References

6 links