What is the CVSS score of CVE-2021-26911?

CVE-2021-26911 has a CVSS 3.1 base score of 7.4 (High). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N. EPSS exploitation probability: 1.1%.

Is there a public PoC exploit available for CVE-2021-26911?

Yes, a public proof-of-concept exploit is available for CVE-2021-26911. Prioritise patching immediately. EPSS: 1.1%.

Is there a patch available for CVE-2021-26911?

Yes, a patch is available for CVE-2021-26911. Update the affected software to the latest version immediately.

Canary Mail CVE-2021-26911

HIGH

Improper Certificate Validation (CWE-295)

2021-02-17 cve@mitre.org

Information Disclosure Canary Mail Mailcore2

7.4

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.4 HIGH

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Lifecycle Timeline

CVE Published

Feb 17, 2021 - 21:15 nvd

HIGH 7.4

DescriptionNVD

core/imap/MCIMAPSession.cpp in Canary Mail before 3.22 has Missing SSL Certificate Validation for IMAP in STARTTLS mode.

AnalysisAI

core/imap/MCIMAPSession.cpp in Canary Mail before 3.22 has Missing SSL Certificate Validation for IMAP in STARTTLS mode. Rated high severity (CVSS 7.4), this vulnerability is remotely exploitable, no authentication required. Public exploit code available.

Technical ContextAI

This vulnerability is classified under CWE-295. core/imap/MCIMAPSession.cpp in Canary Mail before 3.22 has Missing SSL Certificate Validation for IMAP in STARTTLS mode. Affected products include: Canarymail Canary Mail, Libmailcore Mailcore2. Version information: before 3.22.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.