CVE-2021-27189
The CIRA Canadian Shield app before 4.0.13 for iOS lacks SSL Certificate Validation.
The CIRA Canadian Shield app before 4.0.13 for iOS lacks SSL Certificate Validation.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
The CIRA Canadian Shield app before 4.0.13 for iOS lacks SSL Certificate Validation.
- Record
CVE-2021-27189- CVSS 3.1
- 5.9 Medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:P/I:N/A:N - Weakness
- CWE-295
- Updated
- 2026-11-02
CVE ListNo score
The CIRA Canadian Shield app before 4.0.13 for iOS lacks SSL Certificate Validation.
- Record
CVE-2021-27189- Updated
- 2026-11-02
EUVDEUVD-2021-13955No score
The CIRA Canadian Shield app before 4.0.13 for iOS lacks SSL Certificate Validation.
- Record
EUVD-2021-13955- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-fpr2-m5hr-2pmmNo score
The CIRA Canadian Shield app before 4.0.13 for iOS lacks SSL Certificate Validation.
The CIRA Canadian Shield app before 4.0.13 for iOS lacks SSL Certificate Validation.
- Record
GHSA-fpr2-m5hr-2pmm- Weakness
- CWE-295
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-27189 is a medium vulnerability (CVSS 5.9) in Cira Canadian Shield, published February 22, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.05%, the 64th percentile. No source names a fixed version.