CVE-2024-27686

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-05-08. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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(medium)
EG Risk
65(Track)
EG Risk 65/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
46%
KEV
Not listed

Published

May 8, 2026

Last Modified

May 8, 2026

Advisory Details (2)

Auto-updated Jun 9, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

RouterOS 6.40.5 - 6.44 and 6.48.1 - 6.49.10 - Denial of Service - Hardware dos Exploit

https://www.exploit-db.com/exploits/51931
generic

GitHub - ice-wzl/RouterOS-SMB-DOS-POC: This repository contains a working POC for a Denial of Service condition bug that is found on the SMB service for RouterOS devices. · GitHub

https://github.com/ice-wzl/RouterOS-SMB-DOS-POC

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 35× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 257 total refreshes for this CVE.

  1. 2026-09-15 03:08 UTCEPSS rescore
  2. 2026-09-15 03:08 UTCEPSS rescore
  3. 2026-09-13 16:45 UTCEPSS rescore
  4. 2026-09-12 14:59 UTCEPSS rescore
  5. 2026-09-11 14:51 UTCEPSS rescore
  6. 2026-09-11 09:35 UTCEPSS rescore
  7. 2026-09-08 21:58 UTCEPSS rescore
  8. 2026-09-07 15:59 UTCEPSS rescore
  9. 2026-09-06 13:46 UTCEPSS rescore
  10. 2026-09-06 13:46 UTCEPSS rescore
  11. 2026-09-05 15:26 UTCEPSS rescore
  12. 2026-09-04 13:58 UTCEPSS rescore
  13. 2026-09-04 05:05 UTCEPSS rescore
  14. 2026-09-02 14:10 UTCEPSS rescore
  15. 2026-09-01 13:52 UTCEPSS rescore
  16. 2026-08-30 19:15 UTCEPSS rescore
  17. 2026-08-30 01:20 UTCEPSS rescore
  18. 2026-08-28 21:39 UTCEPSS rescore
  19. 2026-08-27 14:23 UTCEPSS rescore
  20. 2026-08-26 14:44 UTCEPSS rescore
  21. 2026-08-25 13:47 UTCEPSS rescore
  22. 2026-08-24 14:15 UTCEPSS rescore
  23. 2026-08-23 19:29 UTCEG score recompute
  24. 2026-08-23 19:29 UTCGHSA enrichment
  25. 2026-08-23 00:17 UTCEPSS rescore
Show 75 more
  1. 2026-08-21 23:47 UTCEPSS rescore
  2. 2026-08-20 22:53 UTCEPSS rescore
  3. 2026-08-19 17:02 UTCEPSS rescore
  4. 2026-08-19 17:02 UTCEPSS rescore
  5. 2026-08-18 13:46 UTCEPSS rescore
  6. 2026-08-18 13:46 UTCEPSS rescore
  7. 2026-08-17 13:45 UTCEPSS rescore
  8. 2026-08-17 11:58 UTCEG score recompute
  9. 2026-08-17 11:58 UTCGHSA enrichment
  10. 2026-08-16 14:54 UTCEPSS rescore
  11. 2026-08-16 04:40 UTCEG score recompute
  12. 2026-08-16 04:40 UTCGHSA enrichment
  13. 2026-08-16 02:13 UTCEPSS rescore
  14. 2026-08-15 02:18 UTCEG score recompute
  15. 2026-08-15 02:18 UTCGHSA enrichment
  16. 2026-08-15 01:28 UTCEPSS rescore
  17. 2026-08-14 14:47 UTCGHSA enrichment
  18. 2026-08-14 03:15 UTCEG score recompute
  19. 2026-08-14 03:15 UTCGHSA enrichment
  20. 2026-08-13 21:59 UTCEPSS rescore
  21. 2026-08-13 04:23 UTCGHSA enrichment
  22. 2026-08-12 16:50 UTCEG score recompute
  23. 2026-08-12 16:50 UTCGHSA enrichment
  24. 2026-08-12 13:49 UTCEPSS rescore
  25. 2026-08-11 15:53 UTCEG score recompute
  26. 2026-08-11 15:53 UTCGHSA enrichment
  27. 2026-08-11 13:40 UTCEPSS rescore
  28. 2026-08-11 01:21 UTCEG score recompute
  29. 2026-08-11 01:21 UTCGHSA enrichment
  30. 2026-08-10 23:58 UTCEPSS rescore
  31. 2026-08-10 13:02 UTCGHSA enrichment
  32. 2026-08-10 01:30 UTCGHSA enrichment
  33. 2026-08-09 13:59 UTCEG score recompute
  34. 2026-08-09 13:59 UTCGHSA enrichment
  35. 2026-08-09 13:45 UTCEPSS rescore
  36. 2026-08-09 02:27 UTCEG score recompute
  37. 2026-08-09 02:27 UTCGHSA enrichment
  38. 2026-08-08 16:35 UTCEPSS rescore
  39. 2026-08-08 09:32 UTCGHSA enrichment
  40. 2026-08-07 22:00 UTCEG score recompute
  41. 2026-08-07 22:00 UTCGHSA enrichment
  42. 2026-08-07 16:25 UTCEPSS rescore
  43. 2026-08-07 10:29 UTCGHSA enrichment
  44. 2026-08-06 21:42 UTCEG score recompute
  45. 2026-08-06 21:42 UTCGHSA enrichment
  46. 2026-08-06 13:45 UTCEPSS rescore
  47. 2026-08-06 10:08 UTCGHSA enrichment
  48. 2026-08-05 22:11 UTCEG score recompute
  49. 2026-08-05 22:11 UTCGHSA enrichment
  50. 2026-08-05 19:16 UTCEPSS rescore
  51. 2026-08-04 15:08 UTCEPSS rescore
  52. 2026-08-04 10:36 UTCEPSS rescore
  53. 2026-08-03 19:34 UTCEG score recompute
  54. 2026-08-03 19:34 UTCGHSA enrichment
  55. 2026-08-03 10:34 UTCEPSS rescore
  56. 2026-08-03 02:40 UTCGHSA enrichment
  57. 2026-08-02 15:08 UTCGHSA enrichment
  58. 2026-08-02 03:36 UTCEG score recompute
  59. 2026-08-02 03:35 UTCGHSA enrichment
  60. 2026-08-02 02:25 UTCEPSS rescore
  61. 2026-08-02 02:25 UTCEPSS rescore
  62. 2026-08-01 04:14 UTCEPSS rescore
  63. 2026-07-30 16:26 UTCEPSS rescore
  64. 2026-07-30 16:26 UTCEPSS rescore
  65. 2026-07-30 01:29 UTCEPSS rescore
  66. 2026-07-28 15:34 UTCEPSS rescore
  67. 2026-07-27 14:11 UTCEPSS rescore
  68. 2026-07-26 14:53 UTCEPSS rescore
  69. 2026-07-26 14:53 UTCEPSS rescore
  70. 2026-07-25 14:16 UTCEPSS rescore
  71. 2026-07-24 14:16 UTCEPSS rescore
  72. 2026-07-23 14:17 UTCEPSS rescore
  73. 2026-07-23 02:35 UTCEG score recompute
  74. 2026-07-22 14:07 UTCEPSS rescore
  75. 2026-07-21 15:23 UTCEPSS rescore

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 1% probability of exploitation in the next 30 days, which ranks it in the top 53.5% of all scored CVEs.
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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