CISA KEV · Known exploitedHigh

CVE-2016-6415

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
EPSS
87.3%
99.7% percentile
CISA KEV
Listed
Published
2016.09.19
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability87.3%
Technical severityCVSS 7.5

Vulnerability overview

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.

Affected product and versions

Product
Cisco IOS, IOS XR, and IOS XE
Affected versions
>= 12.2 <= 12.4, >= 15.0 <= 15.6, <= 3.18s, >= 4.3.0 <= 4.3.4, >= 5.0.0 < 5.3.0
Fixed versions
5.3.0

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

Apply updates per vendor instructions.

Due date: 2023.06.09
  1. 1
    Identify

    Confirm that Cisco IOS, IOS XR, and IOS XE and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
CWE-200
KEV added
2023.05.19
Ransomware use
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