SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2012-5017

Cisco IOS before 15.1(1)SY1 allows remote authenticated users to cause a denial of service (device reload) by establishing a VPN session and then sending malformed IKEv2 packets, aka Bug ID CSCub39268.

MEDIUM 6.8EPSS 1.54%

Does this matter?

Lower severity and a low EPSS score (1.54%). Track it; it rarely justifies an emergency change on its own.

Description

Cisco IOS before 15.1(1)SY1 allows remote authenticated users to cause a denial of service (device reload) by establishing a VPN session and then sending malformed IKEv2 packets, aka Bug ID CSCub39268.

CVSS 2.0
6.8 MEDIUMAV:N/AC:L/Au:S/C:N/I:N/A:C
EPSS
1.54% probability · 75th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-20
Affected
cisco/ios · cisco/asr 1001 · cisco/asr 1002 · cisco/asr 1002-x · cisco/asr 1002 fixed router · cisco/asr 1004 · cisco/asr 1006 · cisco/asr 1023 router
Source
psirt@cisco.com
EPSS trend
0%3%5%26 October 2026: 1.54%26 October 202626 October 2026

EPSS 1.5% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.