Is CVE-2017-6770 being actively exploited?

CVE-2017-6770 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2017-6770?

CVE-2017-6770 has a CVSS 3.1 base score of 4.2 (MEDIUM).

CVE-2017-6770

MEDIUM · CVSS 4.2EPSS 1.7%EU EUVD

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.

Key facts

CVSS score: 4.2 (v3.1)
Severity: MEDIUM
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
Weakness (CWE): CWE-20
EPSS score: 1.7% (77th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2017-15824)
Published: August 7, 2017
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2017-15824 in the EU Vulnerability Database. Last updated in EUVD on August 5, 2024.

View on the EU Vulnerability Database

Affected products

cisco / adaptive security appliance software
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cisco / adaptive security appliance software
cisco / adaptive security appliance software

and 950 more…

Certified products that may be affected

10 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Cisco Nexus 9000 Switch Series with ACI mode, APIC 6.1(2g) and NX-OS software-ACI 16.1(2g) - Cisco Systems, Inc. - Common Criteria NSCIB-CC-2400067-01-CR - active
Cisco Nexus 5600 Series Switches with 2000 Series Fabric Extenders running NX-OS 7.2(1)N1(1) - Cisco Systems, Inc. - Common Criteria NSCIB-CC-15-77333-CR - archived
Cisco Catalyst 3K/4K Wired Access Switches running IOS-XE 3.8.0E - Cisco Systems, Inc. - Common Criteria CCEVS-VR-VID-10688-2016 - archived
Cisco Aggregation Services Router (ASR) 1000 Series, IOS XE 3.13 - Cisco Systems, Inc. - Common Criteria CCEVS-VR-VID-10609-2015 - archived
Cisco Integrated Services Router 4400 Series (ISR-4400), IOS XE 3.13.0 - Cisco Systems, Inc. - Common Criteria CCEVS-VR-VID-10600-2015 - archived

See all 10 in the Security Certifications Explorer.

References

http://www.securityfocus.com/bid/100005(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id/1039005(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id/1039006(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id/1039007(Third Party Advisory, VDB Entry)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170727-ospf(Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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