CVE-2017-12300

MEDIUMNVD 5.85.8—
EchelonGraph scoreMEDIUM confidence

Score 5.8 from GitHub Security Advisory published 2022-05-13. NVD baseline CVSS 5.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.8
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 2%CVSS: 5.8Exploit: NoneExposed: 0

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

A vulnerability in the SNORT detection engine of Cisco Firepower System Software could allow an unauthenticated, remote attacker to bypass a file policy that is configured to block the Server Message Block Version 2 (SMB2) protocol. The vulnerability is due to the incorrect detection of an SMB2 file when the detection is based on the length of the file. An attacker could exploit this vulnerability by sending a crafted SMB2 transfer request through the targeted device. A successful exploit could allow the attacker to bypass filters that are configured to block SMB2 traffic. Cisco Bug IDs: CSCve58398.

CVSS v3
5.8
EG Score
5.8(medium)
EPSS
72.9%
KEV
Not listed

Published

November 16, 2017

Last Modified

May 13, 2026

References (4)

Data Freshness Timeline

(refreshed 9× in last 7d / 31× 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.

  1. 2026-07-07 13:42 UTCEPSS rescore
  2. 2026-07-06 16:24 UTCEPSS rescore
  3. 2026-07-06 02:20 UTCEPSS rescore
  4. 2026-07-05 02:27 UTCEPSS rescore
  5. 2026-07-04 06:28 UTCEPSS rescore
  6. 2026-07-01 15:02 UTCEPSS rescore
  7. 2026-07-01 15:02 UTCEPSS rescore
  8. 2026-06-30 23:19 UTCEPSS rescore
  9. 2026-06-30 23:19 UTCEPSS rescore
  10. 2026-06-28 14:04 UTCEPSS rescore
  11. 2026-06-28 04:53 UTCEPSS rescore
  12. 2026-06-27 03:05 UTCEPSS rescore
  13. 2026-06-25 13:47 UTCEPSS rescore
  14. 2026-06-25 13:47 UTCEPSS rescore
  15. 2026-06-24 14:02 UTCEPSS rescore
  16. 2026-06-23 21:30 UTCEPSS rescore
  17. 2026-06-21 14:54 UTCEPSS rescore
  18. 2026-06-21 14:54 UTCEPSS rescore
  19. 2026-06-19 19:23 UTCEPSS rescore
  20. 2026-06-19 19:23 UTCEPSS rescore
  21. 2026-06-18 17:50 UTCEPSS rescore
  22. 2026-06-17 17:50 UTCEPSS rescore
  23. 2026-06-16 17:50 UTCEPSS rescore
  24. 2026-06-15 17:45 UTCEPSS rescore
  25. 2026-06-14 23:14 UTCEPSS rescore
Show 41 more
  1. 2026-06-14 23:14 UTCEPSS rescore
  2. 2026-06-13 22:57 UTCEPSS rescore
  3. 2026-06-12 23:09 UTCEPSS rescore
  4. 2026-06-11 13:57 UTCEPSS rescore
  5. 2026-06-10 22:15 UTCEPSS rescore
  6. 2026-06-08 14:14 UTCEPSS rescore
  7. 2026-06-07 15:22 UTCEPSS rescore
  8. 2026-06-07 15:22 UTCEPSS rescore
  9. 2026-06-06 13:45 UTCEPSS rescore
  10. 2026-06-06 13:45 UTCEPSS rescore
  11. 2026-06-05 22:44 UTCEPSS rescore
  12. 2026-06-05 06:08 UTCEPSS rescore
  13. 2026-06-05 06:08 UTCEPSS rescore
  14. 2026-06-04 13:10 UTCEPSS rescore
  15. 2026-06-04 13:10 UTCEPSS rescore
  16. 2026-06-02 20:11 UTCEPSS rescore
  17. 2026-06-02 20:11 UTCEPSS rescore
  18. 2026-06-01 13:49 UTCEPSS rescore
  19. 2026-06-01 13:49 UTCEPSS rescore
  20. 2026-05-31 22:28 UTCEPSS rescore
  21. 2026-05-31 00:14 UTCEPSS rescore
  22. 2026-05-29 13:41 UTCEPSS rescore
  23. 2026-05-28 13:42 UTCEPSS rescore
  24. 2026-05-28 13:42 UTCEPSS rescore
  25. 2026-05-27 13:38 UTCEPSS rescore
  26. 2026-05-27 13:38 UTCEPSS rescore
  27. 2026-05-26 13:42 UTCEPSS rescore
  28. 2026-05-26 13:42 UTCEPSS rescore
  29. 2026-05-26 07:17 UTCEPSS rescore
  30. 2026-05-26 07:17 UTCEPSS rescore
  31. 2026-05-22 21:15 UTCEPSS rescore
  32. 2026-05-22 21:15 UTCEPSS rescore
  33. 2026-05-22 21:15 UTCEPSS rescore
  34. 2026-05-22 08:01 UTCEG score recompute
  35. 2026-05-22 08:01 UTCGHSA enrichment
  36. 2026-05-20 22:37 UTCEPSS rescore
  37. 2026-05-20 22:37 UTCEPSS rescore
  38. 2026-05-20 11:21 UTCEPSS rescore
  39. 2026-05-20 11:21 UTCEPSS rescore
  40. 2026-05-18 21:30 UTCEPSS rescore
  41. 2026-05-18 21:30 UTCEPSS rescore

Frequently asked(5)

What is CVE-2017-12300?
CVE-2017-12300 is a medium vulnerability published on November 16, 2017. A vulnerability in the SNORT detection engine of Cisco Firepower System Software could allow an unauthenticated, remote attacker to bypass a file policy that is configured to block the Server Message Block Version 2 (SMB2) protocol. The vulnerability is due to the incorrect detection of an SMB2…
When was CVE-2017-12300 disclosed?
CVE-2017-12300 was first published in the National Vulnerability Database on November 16, 2017, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-12300 actively exploited?
CVE-2017-12300 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 72.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2017-12300?
CVE-2017-12300 has a CVSS v3 base score of 5.8 (NVD).
How do I remediate CVE-2017-12300?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-12300, 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

Explore the affected products and dependency analysis for CVE-2017-12300

Explore →

Is Your Infrastructure Affected by CVE-2017-12300?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs