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CVE-2016-6466

20
FAUCET Score

CVE-2016-6466 is a denial-of-service vulnerability in the IPsec component of StarOS for Cisco ASR 5000 Series routers and Cisco Virtualized Packet Core. An unauthenticated, remote attacker can exploit this flaw to terminate all active IPsec VPN tunnels and prevent new ones from establishing. With a CVSS v3 score of 7.5 (High), this vulnerability is easily exploitable over the network with low attack complexity, leading to a complete loss of availability. There is no known public exploit code, Metasploit modules, or evidence of active exploitation, and it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
20.0.0CPE matchmatch criteria
cpe:2.3:a:cisco:asr_5000_series_software:20.0.0:*:*:*:*:*:*:*
20.0.2.3CPE matchmatch criteria
cpe:2.3:a:cisco:asr_5000_series_software:20.0.2.3:*:*:*:*:*:*:*
20.0.2.v1CPE matchmatch criteria
cpe:2.3:a:cisco:asr_5000_series_software:20.0.2.v1:*:*:*:*:*:*:*
20.0_baseCPE matchmatch criteria
cpe:2.3:a:cisco:virtualized_packet_core:20.0_base:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.58%
Probability of exploitation in next 30 days
EPSS Percentile
83.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0259 is in the 71st percentile among its peer group of 51,485 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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-20161116-asr
Vendor Advisory
securityfocus.com / bid/94361
securitytracker.com / id/1037308