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CVE-2017-6770

18
FAUCET Score

CVE-2017-6770 is a vulnerability in the Open Shortest Path First (OSPF) routing protocol affecting Cisco IOS, ASA Software, NX-OS, and IOS XE. An unauthenticated, remote attacker can exploit this by injecting crafted OSPF packets to take full control of the OSPF Autonomous System (AS) domain routing table, leading to traffic interception or black-holing. The CVSS score is 4.2 (Medium), indicating a network-based attack with high complexity, requiring specific LSA database parameters. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
1.1\(0.825a\)CPE matchmatch criteria
cpe:2.3:a:cisco:nx-os:1.1\(0.825a\):*:*:*:*:nexus_9000_series:*:*
1.1\(1g\)CPE matchmatch criteria
cpe:2.3:a:cisco:nx-os:1.1\(1g\):*:*:*:*:nexus_9000_series:*:*
7.3\(1\)n1\(1\)CPE matchmatch criteria
cpe:2.3:a:cisco:nx-os_for_nexus_5500_platform_switches:7.3\(1\)n1\(1\):*:*:*:*:*:*:*
baseCPE matchmatch criteria
cpe:2.3:a:cisco:nx-os_for_nexus_5500_platform_switches:base:*:*:*:*:*:*:*
7.3\(1\)n1\(1\)CPE matchmatch criteria
cpe:2.3:a:cisco:nx-os_for_nexus_5600_platform_switches:7.3\(1\)n1\(1\):*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.2MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
1.6
Impact Score
2.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.69%
Probability of exploitation in next 30 days
EPSS Percentile
74.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0169 is in the 83rd percentile among its peer group of 705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.2 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20170727-ospf
Vendor Advisory
securityfocus.com / bid/100005
Third Party AdvisoryVDB Entry
securitytracker.com / id/1039005
Third Party AdvisoryVDB Entry
securitytracker.com / id/1039006
Third Party AdvisoryVDB Entry
securitytracker.com / id/1039007
Third Party AdvisoryVDB Entry