CVE-2024-27686

HIGHNVD 7.57.5—Elevated

7.5

Mikrotik RouterOS (x86) 6.40.5 through 6.49.10 (fixed in 7) allows a remote attacker to cause a denial of service (device crash) via crafted packet data to the SMB service on TCP port 445.

CVSS v3: 7.5
EG Score: 7.5(high)
EPSS: 61.9%
KEV: Not listed

Published

May 8, 2026

Last Modified

May 8, 2026

References (2)

cve@mitrehttps://github.com/ice-wzl/RouterOS-SMB-DOS-POC
cve@mitrehttps://www.exploit-db.com/exploits/51931

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-400Uncontrolled Resource Consumption (Denial of Service)

Data Freshness Timeline

(refreshed 15× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

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Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoCThemeHackers/CVE-2024-27686
First seen Jul 26, 2025
This document describes a Denial of Service (DoS) vulnerability found in certain versions of MikroTik RouterOS. The vulnerability is due to insufficient handling of crafted SMB requests. A remote attacker could exploit this issue by sending a specially crafted request to the target server.
Open source ↗

Frequently asked(5)

What is CVE-2024-27686?

CVE-2024-27686 is a high vulnerability published on May 8, 2026. Mikrotik RouterOS (x86) 6.40.5 through 6.49.10 (fixed in 7) allows a remote attacker to cause a denial of service (device crash) via crafted packet data to the SMB service on TCP port 445.

When was CVE-2024-27686 disclosed?

CVE-2024-27686 was first published in the National Vulnerability Database on May 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2024-27686 actively exploited?

CVE-2024-27686 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 61.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2024-27686?

CVE-2024-27686 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2024-27686?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-27686, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2024-27686

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2024-27686?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)