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HIGH · CVSS 7.5 CISA Known Exploited Vulnerability

CVE-2016-6415

Cisco IOS, IOS XR, and IOS XE IKEv1 Information Disclosure Vulnerability

Cisco IOS, IOS XR, and IOS XE

The server IKEv1 implementation in Cisco IOS 12.2 through 12.4 and 15.0 through 15.6, IOS XE through 3.18S, IOS XR 4.3.x and 5.0.x through 5.2.x, and PIX before 7.0 allows remote attackers to obtain sensitive information from device memory via a Security Association (SA) negotiation request, aka Bug IDs CSCvb29204 and CSCvb36055 or BENIGNCERTAIN.

CVSS
7.5
HIGH
EPSS
87.7%
30-day exploitation
Ransomware groups
0
recorded exploiting
Published
19 Sep 2016
CWE-200

Exploitation status

CISA Known Exploited Vulnerabilities

Listed by CISA on 19 May 2023. US federal agencies were required to remediate it by 9 June 2023.

EPSS — exploitation probability

FIRST puts the probability of exploitation activity in the next 30 days at 87.7%, which is higher than 99.8% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.

CVSS vector

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

Frequently asked questions

Is CVE-2016-6415 being exploited by ransomware groups?

No ransomware group in this database is currently recorded as exploiting CVE-2016-6415.

What does CVE-2016-6415 affect?

CVE-2016-6415 affects Cisco IOS, IOS XR, and IOS XE. The server IKEv1 implementation in Cisco IOS 12.2 through 12.4 and 15.0 through 15.6, IOS XE through 3.18S, IOS XR 4.3.x and 5.0.x through 5.2.x, and PIX before 7.0 allows remote attackers to obtain sensitive information from device memory via a Security Association (SA) negotiation request, aka Bug IDs CSCvb29204 and CSCvb36055 or BENIGNCERTAIN.

How severe is CVE-2016-6415?

CVE-2016-6415 is rated HIGH with a CVSS base score of 7.5. EPSS puts the probability of exploitation in the next 30 days at 87.7%, higher than 99.8% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 9 June 2023.

How should organisations respond to CVE-2016-6415?

Apply the vendor patch for Cisco IOS, IOS XR, and IOS XE as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.