5.3

CVE-2021-1837: apple ios and ipados Improper Certificate Validation

CVSS: 5.3v3.1MediumModified
Published 08-09-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-1837 is a medium (CVSS 5.3) Improper Certificate Validation vulnerability in apple ios and ipados. EPSS estimates a 0.49% chance of exploitation in the next 30 days, higher than 41.1% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (NVD)
EPSS score
0.49%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 08-09-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

A certificate validation issue was addressed. This issue is fixed in iOS 14.5 and iPadOS 14.5. An attacker in a privileged network position may be able to alter network traffic.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

0.49%

Chance of exploitation in the next 30 days

Percentile

41%

Versus all other CVEs

30-day change

0.00 pp

From 0.49% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.49%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Apple3 products

1 vendor · 3 products

References

1 links