CVE-2017-6770

MEDIUMNVD 4.24.2—
EchelonGraph scoreMEDIUM confidence

Score 4.2 from GitHub Security Advisory published 2022-05-13. NVD baseline CVSS 4.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
4.2
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 2%CVSS: 4.2Exploit: NoneExposed: 0

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

Cisco IOS 12.0 through 15.6, Adaptive Security Appliance (ASA) Software 7.0.1 through 9.7.1.2, NX-OS 4.0 through 12.0, and IOS XE 3.6 through 3.18 are affected by a vulnerability involving the Open Shortest Path First (OSPF) Routing Protocol Link State Advertisement (LSA) database. This vulnerability could allow an unauthenticated, remote attacker to take full control of the OSPF Autonomous System (AS) domain routing table, allowing the attacker to intercept or black-hole traffic. The attacker could exploit this vulnerability by injecting crafted OSPF packets. Successful exploitation could cause the targeted router to flush its routing table and propagate the crafted OSPF LSA type 1 update throughout the OSPF AS domain. To exploit this vulnerability, an attacker must accurately determine certain parameters within the LSA database on the target router. This vulnerability can only be triggered by sending crafted unicast or multicast OSPF LSA type 1 packets. No other LSA type packets can trigger this vulnerability. OSPFv3 is not affected by this vulnerability. Fabric Shortest Path First (FSPF) protocol is not affected by this vulnerability. Cisco Bug IDs: CSCva74756, CSCve47393, CSCve47401.

CVSS v3
4.2
EG Score
4.2(medium)
EPSS
74.3%
KEV
Not listed

Published

August 7, 2017

Last Modified

May 13, 2026

References (10)

Data Freshness Timeline

(refreshed 12× in last 7d / 45× 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
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  9. 2026-07-02 16:54 UTCEPSS rescore
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  11. 2026-06-30 23:19 UTCEPSS rescore
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  1. 2026-06-21 14:54 UTCEPSS rescore
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  17. 2026-06-10 22:15 UTCEPSS rescore
  18. 2026-06-10 13:19 UTCEPSS rescore
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  21. 2026-06-07 15:22 UTCEPSS rescore
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  23. 2026-06-06 13:45 UTCEPSS rescore
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  25. 2026-06-05 22:44 UTCEPSS rescore
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  27. 2026-06-05 06:08 UTCEPSS rescore
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  35. 2026-05-31 22:28 UTCEPSS rescore
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  38. 2026-05-29 13:41 UTCEPSS rescore
  39. 2026-05-28 13:42 UTCEPSS rescore
  40. 2026-05-28 13:42 UTCEPSS rescore
  41. 2026-05-27 13:38 UTCEPSS rescore
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  43. 2026-05-26 13:42 UTCEPSS rescore
  44. 2026-05-26 07:17 UTCEPSS rescore
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  46. 2026-05-22 21:15 UTCEPSS rescore
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  53. 2026-05-22 11:08 UTCEG score recompute
  54. 2026-05-22 11:08 UTCGHSA enrichment
  55. 2026-05-21 22:40 UTCEPSS rescore
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  57. 2026-05-20 22:37 UTCEPSS rescore
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  66. 2026-05-20 11:21 UTCEPSS rescore
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  72. 2026-05-18 21:30 UTCEPSS rescore
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  74. 2026-05-18 21:30 UTCEPSS rescore

Frequently asked(5)

What is CVE-2017-6770?
CVE-2017-6770 is a medium vulnerability published on August 7, 2017. Cisco IOS 12.0 through 15.6, Adaptive Security Appliance (ASA) Software 7.0.1 through 9.7.1.2, NX-OS 4.0 through 12.0, and IOS XE 3.6 through 3.18 are affected by a vulnerability involving the Open Shortest Path First (OSPF) Routing Protocol Link State Advertisement (LSA) database. This…
When was CVE-2017-6770 disclosed?
CVE-2017-6770 was first published in the National Vulnerability Database on August 7, 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-2017-6770 actively exploited?
CVE-2017-6770 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 74.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2017-6770?
CVE-2017-6770 has a CVSS v3 base score of 4.2 (NVD).
How do I remediate CVE-2017-6770?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-6770, 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.

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