Sleipnir Mobile for iPhone / iPad and Sleipnir Mobile for iPhone / iPad Black Edition provided by Fenrir Inc. are vulnerable to improper certificate verification. A man-in-the-middle attack may allow an attacker to eavesdrop on an encrypted communication.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction Passive

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00164.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Fenrir Inc. Sleipnir Mobile for iPhone / iPad unaffected
Version Status Constraints
0 affected ≤ v4.15.1
Fenrir Inc. Sleipnir Mobile for iPhone / iPad Black Edition unaffected
Version Status Constraints
0 affected ≤ v4.15.1

No data.

No data.

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No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://apps.apple.com/jp/app/sleipnir-mobile-black-edition/id461181338 cve-icon cve-icon
https://apps.apple.com/us/app/sleipnir-mobile/id404732112 cve-icon cve-icon
https://jvn.jp/en/vu/JVNVU93068550/ cve-icon cve-icon
History

Wed, 11 Nov 2026 19:45:00 +0000

Type Values Removed Values Added
Title Improper Certificate Verification in Fenrir Inc. Sleipnir Mobile Enables Man‑in‑the‑Middle Eavesdropping

Wed, 11 Nov 2026 05:30:00 +0000

Type Values Removed Values Added
Description Sleipnir Mobile for iPhone / iPad and Sleipnir Mobile for iPhone / iPad Black Edition provided by Fenrir Inc. are vulnerable to improper certificate verification. A man-in-the-middle attack may allow an attacker to eavesdrop on an encrypted communication.
Weaknesses CWE-295
References
Metrics cvssV3_1

{'score': 4.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N'}

cvssV4_0

{'score': 2.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: jpcert

Published:

Updated: 2026-11-11T05:19:16.842Z

Reserved: 2026-11-10T08:07:47.836Z

Link: CVE-2026-116081

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-11T06:17:14.030

Modified: 2026-11-11T06:17:14.030

Link: CVE-2026-116081

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-11T19:30:09Z

Weaknesses