CVE-2026-14227
View CSAF Summary Successful exploitation of this vulnerability could allow an attacker to extract the router's WireGuard private key in plaintext using only low‑privilege API access, enabling full VPN impersonation and decryption of all associated traffic. The following versions of MikroTik RouterOS are affected: RouterOS vers:all/* (CVE-2026-14227) CVSS Vendor Equipment Vulnerabilities v3 4.9 MikroTik MikroTik RouterOS Insufficient Session Expiration Background Critical Infrastructure Sectors: Information Technology Countries/Areas Deployed: Worldwide Company Headquarters Location: Latvia Vulnerabilities Expand All + CVE-2026-14227 An API session‑management flaw in products with the MikroTik RouterOS API enabled are vulnerable to a Insufficient Session Expiration vulnerability. This could allow active sessions to retain their previous permission set after inactivity timeouts or user‑group changes. As a result, an authenticated user whose permissions have been reduced may continue accessing information. View CVE Details Affected Products MikroTik RouterOS Vendor: MikroTik Product Version: MikroTik RouterOS: vers:all/* Product Status: known_affected Remediations Mitigation MikroTik recommends administrators to ensure that when a user's permissions are downgraded, the affected user is fully logged out so the new policy can take effect. Mitigation For more information, contact MikroTik (https://mikrotik.com/support). https://mikrotik.com/support Relevant CWE: CWE-613 Insufficient Session Expiration Metrics CVSS Version Base Score Base Severity Vector String 3.1 4.9 MEDIUM CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N 4.0 6.9 MEDIUM CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N Acknowledgments Andre Santos reported this vulnerability to CISA Legal Notice and Terms of Use This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy). Recommended Practices CIS
CSIRTS triage
- What
- A vulnerability allows extraction of the router's WireGuard private key in plaintext.
- Who is affected
- Users of MikroTik RouterOS with the API enabled.
- Urgency
- Remediation is critical due to the potential for full VPN impersonation and decryption of traffic.
- Action
- Apply necessary updates to MikroTik RouterOS.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.22% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 13% of all EPSS-scored CVEs.
Advisory coverage (2)
- mediumCVE-2026-14227: An API session‑management flaw in products with the MikroTik RouterOS API enabled are vulnerab…nvd · 2026-07-30
- criticalMikroTik RouterOScisa · 2026-07-30
External references
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