CVE & CISA-KEV Catalog

CVE-2021-21186

MEDIUM
4.3
CVSS v3
NVD

Description

Insufficient policy enforcement in QR scanning in Google Chrome on iOS prior to 89.0.4389.72 allowed an attacker who convinced the user to scan a QR code to bypass navigation restrictions via a crafted QR code.

CWE-863Incorrect Authorization

How to fix

Remediation Available
chromiumDebian
Fixed in:89.0.4389.82-1CVE-2021-21186
Fixed in:89.0.4389.82-1CVE-2021-21186
Fixed in:89.0.4389.82-1CVE-2021-21186
Fixed in:89.0.4389.82-1CVE-2021-21186
Google ChromeWindows application
Affected:89.0.4389.72Fixed in:89.0.4389.72Google LLC
Google Chrome (EXE)Windows application
Affected:89.0.4389.72Fixed in:89.0.4389.72Google LLC
Google Chrome BetaWindows application
Affected:89.0.4389.72Fixed in:89.0.4389.72Google LLC
Google Chrome Beta (EXE)Windows application
Affected:89.0.4389.72Fixed in:89.0.4389.72Google LLC
Google Chrome CanaryWindows application
Affected:89.0.4389.72Fixed in:89.0.4389.72Google LLC
Google Chrome DevWindows application
Affected:89.0.4389.72Fixed in:89.0.4389.72Google LLC
Google Chrome Dev (EXE)Windows application
Affected:89.0.4389.72Fixed in:89.0.4389.72Google LLC

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityLow
AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Exploit Intelligence

1.13%probability of exploitation in 30 days
62ndpercentile

Moderate risk: more likely to be exploited than 62% of all known CVEs.

References

Third-Party Advisory2

Related Vulnerabilities

Other CWE-863 (Incorrect Authorization) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2023-22518Critical9.8100%KEV + RansomFix
CVE-2023-38035Critical9.8100%KEV + Ransom-
CVE-2022-46169Critical9.8100%KEVFix
CVE-2025-29927Critical9.1100%-Fix
CVE-2024-38856Critical9.899%KEVFix
CVE-2020-36289Medium5.399%-Fix
Embed a live status badge for CVE-2021-21186
CVE-2021-21186 severity badge

Markdown

[![CVE-2021-21186](https://tridentstack.com/cve/badge/CVE-2021-21186.svg)](https://tridentstack.com/cve/CVE-2021-21186)

HTML

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.