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CVE-2016-6415

97
FAUCET Score

CVE-2016-6415 is a critical information disclosure vulnerability affecting the IKEv1 implementation in various Cisco IOS, IOS XE, and IOS XR versions, allowing remote attackers to extract sensitive data from device memory via crafted Security Association negotiation requests. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network without authentication, leading to a high impact on confidentiality. This flaw is actively exploited in the wild, as evidenced by its presence in CISA's KEV catalog and available Metasploit modules, garnering significant community discussion and media coverage. Its high EPSS score and FAUCET Risk Score of 100/100 underscore the urgent need for remediation.

Impacted Technologies

VendorProductVersion(s)CPE
>= 12.2, <= 12.4CPE matchmatch criteria
cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
>= 15.0, <= 15.6CPE matchmatch criteria
cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
<= 3.18sCPE matchmatch criteria
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
>= 4.3.0, <= 4.3.4CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*
>= 5.0.0, < 5.3.0CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
87.31%
Probability of exploitation in next 30 days
EPSS Percentile
99.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
Added to KEV · May 19, 2023
Metasploit: Cisco IKE Information Disclosure · Sep 29, 2016
ExploitDB: EDB-43383 · Mar 17, 2017
This CVE's current EPSS score of 0.8731 is in the 100th percentile among its peer group of 51,466 CVEs.

Social Chatter

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

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

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20160916-ikev1
Vendor Advisory
securityfocus.com / bid/93003
Third Party AdvisoryVDB Entry
securitytracker.com / id/1036841
Third Party AdvisoryVDB Entry