What’s Vulnerable › Vulnerabilities

CVE-2021-27189

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-02-23 · updated 2026-06-17
• Weakness: CWE-295

Description

The CIRA Canadian Shield app before 4.0.13 for iOS lacks SSL Certificate Validation.

Affected products

• Cira Canadian Shield: before 4.0.13 — fixed in 4.0.13

How to fix

Upgrade to a fixed version: Cira Canadian Shield 4.0.13. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/161507/CIRA-Canadian-Shield-Man-In-The-Middle.html
• http://seclists.org/fulldisclosure/2021/Feb/72
• https://www.info-sec.ca/advisories/CIRA-Canadian-Shield.html
• http://packetstormsecurity.com/files/161507/CIRA-Canadian-Shield-Man-In-The-Middle.html
• http://seclists.org/fulldisclosure/2021/Feb/72
• https://www.info-sec.ca/advisories/CIRA-Canadian-Shield.html

Get alerted when CVE-2021-27189 or the next vulnerability affects your stack