First published: Wed Mar 28 2018(Updated: )
A vulnerability in the Smart Install feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of packet data. An attacker could exploit this vulnerability by sending a crafted packet to an affected device on TCP port 4786. Only Smart Install client switches are affected. Cisco devices that are configured as a Smart Install director are not affected by this vulnerability. Cisco Bug IDs: CSCvd40673.
Credit: ykramarz@cisco.com psirt@cisco.com
Affected Software | Affected Version | How to fix |
---|---|---|
Cisco IOS and IOS XE Software | ||
All of | ||
Any of | ||
Cisco IOS | =15.2\(2\)e4 | |
Cisco IOS | =15.2\(2a\)ja | |
Any of | ||
Cisco Catalyst 2960-plus 24lc-l | ||
Cisco Catalyst 2960-plus 24lc-s | ||
Cisco Catalyst 2960-plus 24pc-l | ||
Cisco Catalyst 2960-Plus 24PC-S | ||
Cisco Catalyst 2960-plus 24tc-l | ||
Cisco Catalyst 2960-plus 48tc-s | ||
Cisco Catalyst 2960-plus 48pst-l | ||
Cisco Catalyst 2960-plus 48pst-s | ||
Cisco Catalyst 2960-plus 48tc-l | ||
Cisco Catalyst 2960-plus 48tc-s | ||
Cisco Catalyst 2960C-12PC-L | ||
Cisco Catalyst 2960CX-8PC-L | ||
Cisco Catalyst 2960c-8pc-l | ||
Cisco Catalyst 2960c-8tc-s | ||
Cisco Catalyst 2960CG-8TC-L | ||
Cisco Catalyst 2960cpd-8pt-l | ||
Cisco Catalyst 2960CPD-8TT-L | ||
Cisco Catalyst 2960S-24PD-L | ||
Cisco Catalyst 2960s-f24ps-l | ||
Cisco Catalyst 2960S-24TD-L | ||
Cisco Catalyst 2960S-24TS-L | ||
Cisco Catalyst 2960 Series | ||
Cisco Catalyst 2960s-48fpd-l | ||
Cisco Catalyst 2960-S 48 FPS-L | ||
Cisco Catalyst 2960S-48LPD-L | ||
Cisco Catalyst 2960S-48LPS-L | ||
Cisco Catalyst 2960S-48TD-L | ||
Cisco Catalyst 2960S-48TS-L | ||
Cisco Catalyst 2960S-48TS-S | ||
Cisco Catalyst 2960s-f24ps-l | ||
Cisco Catalyst 2960S-24TS-L | ||
Cisco Catalyst 2960S-24TS-L | ||
Cisco Catalyst 2960S-48FPS-L | ||
Cisco Catalyst 2960S-48LPS-L | ||
Cisco Catalyst 2960S-48TS-L | ||
Cisco Catalyst 2960S-48TS-S | ||
Cisco Catalyst 2960X Switch | ||
Cisco Catalyst 2960X-24PSQ-L | ||
Cisco Catalyst 2960X-24PSQ-L | ||
Cisco Catalyst 2960X Switch | ||
Cisco Catalyst 2960-X 24TS-L | ||
Cisco Catalyst 2960X-24TS-LL | ||
Cisco Catalyst 2960X Switch | ||
Cisco Catalyst 2960X-48FPS-L | ||
Cisco Catalyst 2960XR-48LPD-L | ||
Cisco Catalyst 2960X Switch | ||
Cisco Catalyst 2960X Switch | ||
Cisco Catalyst 2960X-48TS-LL | ||
Cisco Catalyst 2960X Switch | ||
Cisco Catalyst 2960XR-24PD-I | ||
Cisco Catalyst 2960-XR Series | ||
Cisco Catalyst 2960XR-24TD-I | ||
Cisco Catalyst 2960-XR Series | ||
Cisco Catalyst 2960XR-48FPD-I | ||
Cisco Catalyst 2960XR-48FPS-I | ||
Cisco Catalyst 2960XR-48LPD-I | ||
Cisco Catalyst 2960-XR 48LPS-I | ||
Cisco Catalyst 2960-XR Series | ||
Cisco Catalyst 2960XR 48TS-I | ||
Cisco Catalyst 3560c-12pc-s | ||
Cisco Catalyst 3560c-8pc-s | ||
Cisco Catalyst 3560cg-8pc-s | ||
Cisco Catalyst 3560cg-8tc-s | ||
Cisco Catalyst 3560cpd-8pt-s | ||
Cisco Catalyst 3560x-24p-e | ||
Cisco Catalyst 3560-X Series | ||
Cisco Catalyst 3560x-48p-s | ||
Cisco Catalyst 3560X-24T-E | ||
Cisco Catalyst 3560-X Series | ||
Cisco Catalyst 3560-X Series | ||
Cisco Catalyst 3560-X Series | ||
Cisco Catalyst 3560X-24T-L | ||
Cisco Catalyst 3560x-24u-s | ||
Cisco Catalyst 3560x-48p-e | ||
Cisco Catalyst 3560-X Series | ||
Cisco Catalyst 3560x-48p-s | ||
Cisco Catalyst 3560x-48pf-e | ||
Cisco Catalyst 3560x-48pf-l | ||
Cisco Catalyst 3560x-48pf-s | ||
Cisco Catalyst 3560X-48T-E | ||
Cisco Catalyst 3560-X 48T-L | ||
Cisco Catalyst 3560x-48t-s | ||
Cisco Catalyst 3560-X Series | ||
Cisco Catalyst 3560x-48u-l | ||
Cisco Catalyst 3560-X Series Switches | ||
Cisco Catalyst 3750x-12s-e | ||
Cisco Catalyst 3750X Switch Series | ||
Cisco Catalyst 3750x-24p-e | ||
Cisco Catalyst 3750X Switch | ||
Cisco Catalyst 3750x-24p-s | ||
Cisco Catalyst 3750X Switch | ||
Cisco Catalyst 3750x-24s-s | ||
Cisco Catalyst 3750X Switch | ||
Cisco Catalyst 3750x-24t-l | ||
Cisco Catalyst 3750X-24T-S | ||
Cisco Catalyst 3750-X | ||
Cisco Catalyst 3750X-24U-L | ||
Cisco Catalyst 3750-X Series Switch | ||
Cisco Catalyst 3750x-48p-e | ||
Cisco Catalyst 3750x-48p-l | ||
Cisco Catalyst 3750X Switch | ||
Cisco Catalyst 3750x-48pf-e | ||
Cisco Catalyst 3750x-48pf-l | ||
Cisco Catalyst 3750x-48pf-s | ||
Cisco Catalyst 3750X 48T-E | ||
Cisco Catalyst 3750X-48T-L | ||
Cisco Catalyst 3750x-48t-s | ||
Cisco Catalyst 3750X Switch | ||
Cisco Catalyst 3750X-48U-L | ||
Cisco Catalyst 3750X-48U-S | ||
Cisco Catalyst 4500 Supervisor Engine 6-E (k5) | ||
Cisco Catalyst 4500 Supervisor Engine 6-E | ||
Cisco Catalyst 4900M Switch | ||
Cisco Catalyst 4948e Ethernet Switch | ||
Cisco Catalyst 4948e-f Ethernet Switch | ||
Cisco Embedded Service 2020 | ||
Cisco Embedded Service 2020 | ||
Cisco Embedded Service 2020 | ||
Cisco Embedded Service 2020 | ||
Cisco Embedded Service 2020 | ||
Cisco Embedded Service 2020 | ||
Cisco Embedded Service 2020 | ||
Cisco Embedded Service 2020 | ||
Cisco IE 3010-16S-8PC Industrial Ethernet Switch | ||
Cisco IE 3010-24TC | ||
Cisco IE 2000 Series | ||
Cisco IE 2000 Series Switches | ||
Cisco IE 2000 Series Switches | ||
Cisco IE 2000-16TC | ||
Cisco IE 2000 Series | ||
Cisco IE 2000 Series | ||
Cisco IE 2000 Series | ||
Cisco IE 2000 Series | ||
Cisco IE 2000-24T67 | ||
Cisco IE 2000 Series | ||
Cisco IE 2000 Series | ||
Cisco IE 2000 Series | ||
Cisco IE 2000 Series Switches | ||
Cisco IE 2000 Series Switches | ||
Cisco IE 2000-8T67P | ||
Cisco IE 2000-8T67P | ||
Cisco IE 2000-8TC | ||
Cisco IE 2000 Series | ||
Cisco IE 2000-8TC-G-E | ||
Cisco IE 2000 Series | ||
Cisco IE 3000 | ||
Cisco IE 3000 | ||
All of | ||
Any of | ||
Cisco IOS XE | =15.2\(2\)e4 | |
Cisco IOS XE | =15.2\(2a\)ja | |
Any of | ||
Cisco Catalyst 2960-plus 24lc-l | ||
Cisco Catalyst 2960-plus 24lc-s | ||
Cisco Catalyst 2960-plus 24pc-l | ||
Cisco Catalyst 2960-Plus 24PC-S | ||
Cisco Catalyst 2960-plus 24tc-l | ||
Cisco Catalyst 2960-plus 48tc-s | ||
Cisco Catalyst 2960-plus 48pst-l | ||
Cisco Catalyst 2960-plus 48pst-s | ||
Cisco Catalyst 2960-plus 48tc-l | ||
Cisco Catalyst 2960-plus 48tc-s | ||
Cisco Catalyst 2960C-12PC-L | ||
Cisco Catalyst 2960CX-8PC-L | ||
Cisco Catalyst 2960c-8pc-l | ||
Cisco Catalyst 2960c-8tc-s | ||
Cisco Catalyst 2960CG-8TC-L | ||
Cisco Catalyst 2960cpd-8pt-l | ||
Cisco Catalyst 2960CPD-8TT-L | ||
Cisco Catalyst 2960S-24PD-L | ||
Cisco Catalyst 2960s-f24ps-l | ||
Cisco Catalyst 2960S-24TD-L | ||
Cisco Catalyst 2960S-24TS-L | ||
Cisco Catalyst 2960 Series | ||
Cisco Catalyst 2960s-48fpd-l | ||
Cisco Catalyst 2960-S 48 FPS-L | ||
Cisco Catalyst 2960S-48LPD-L | ||
Cisco Catalyst 2960S-48LPS-L | ||
Cisco Catalyst 2960S-48TD-L | ||
Cisco Catalyst 2960S-48TS-L | ||
Cisco Catalyst 2960S-48TS-S | ||
Cisco Catalyst 2960s-f24ps-l | ||
Cisco Catalyst 2960S-24TS-L | ||
Cisco Catalyst 2960S-24TS-L | ||
Cisco Catalyst 2960S-48FPS-L | ||
Cisco Catalyst 2960S-48LPS-L | ||
Cisco Catalyst 2960S-48TS-L | ||
Cisco Catalyst 2960S-48TS-S | ||
Cisco Catalyst 2960X Switch | ||
Cisco Catalyst 2960X-24PSQ-L | ||
Cisco Catalyst 2960X-24PSQ-L | ||
Cisco Catalyst 2960X Switch | ||
Cisco Catalyst 2960-X 24TS-L | ||
Cisco Catalyst 2960X-24TS-LL | ||
Cisco Catalyst 2960X Switch | ||
Cisco Catalyst 2960X-48FPS-L | ||
Cisco Catalyst 2960XR-48LPD-L | ||
Cisco Catalyst 2960X Switch | ||
Cisco Catalyst 2960X Switch | ||
Cisco Catalyst 2960X-48TS-LL | ||
Cisco Catalyst 2960X Switch | ||
Cisco Catalyst 2960XR-24PD-I | ||
Cisco Catalyst 2960-XR Series | ||
Cisco Catalyst 2960XR-24TD-I | ||
Cisco Catalyst 2960-XR Series | ||
Cisco Catalyst 2960XR-48FPD-I | ||
Cisco Catalyst 2960XR-48FPS-I | ||
Cisco Catalyst 2960XR-48LPD-I | ||
Cisco Catalyst 2960-XR 48LPS-I | ||
Cisco Catalyst 2960-XR Series | ||
Cisco Catalyst 2960XR 48TS-I | ||
Cisco Catalyst 3560c-12pc-s | ||
Cisco Catalyst 3560c-8pc-s | ||
Cisco Catalyst 3560cg-8pc-s | ||
Cisco Catalyst 3560cg-8tc-s | ||
Cisco Catalyst 3560cpd-8pt-s | ||
Cisco Catalyst 3560x-24p-e | ||
Cisco Catalyst 3560-X Series | ||
Cisco Catalyst 3560x-48p-s | ||
Cisco Catalyst 3560X-24T-E | ||
Cisco Catalyst 3560-X Series | ||
Cisco Catalyst 3560-X Series | ||
Cisco Catalyst 3560-X Series | ||
Cisco Catalyst 3560X-24T-L | ||
Cisco Catalyst 3560x-24u-s | ||
Cisco Catalyst 3560x-48p-e | ||
Cisco Catalyst 3560-X Series | ||
Cisco Catalyst 3560x-48p-s | ||
Cisco Catalyst 3560x-48pf-e | ||
Cisco Catalyst 3560x-48pf-l | ||
Cisco Catalyst 3560x-48pf-s | ||
Cisco Catalyst 3560X-48T-E | ||
Cisco Catalyst 3560-X 48T-L | ||
Cisco Catalyst 3560x-48t-s | ||
Cisco Catalyst 3560-X Series | ||
Cisco Catalyst 3560x-48u-l | ||
Cisco Catalyst 3560-X Series Switches | ||
Cisco Catalyst 3750x-12s-e | ||
Cisco Catalyst 3750X Switch Series | ||
Cisco Catalyst 3750x-24p-e | ||
Cisco Catalyst 3750X Switch | ||
Cisco Catalyst 3750x-24p-s | ||
Cisco Catalyst 3750X Switch | ||
Cisco Catalyst 3750x-24s-s | ||
Cisco Catalyst 3750X Switch | ||
Cisco Catalyst 3750x-24t-l | ||
Cisco Catalyst 3750X-24T-S | ||
Cisco Catalyst 3750-X | ||
Cisco Catalyst 3750X-24U-L | ||
Cisco Catalyst 3750-X Series Switch | ||
Cisco Catalyst 3750x-48p-e | ||
Cisco Catalyst 3750x-48p-l | ||
Cisco Catalyst 3750X Switch | ||
Cisco Catalyst 3750x-48pf-e | ||
Cisco Catalyst 3750x-48pf-l | ||
Cisco Catalyst 3750x-48pf-s | ||
Cisco Catalyst 3750X 48T-E | ||
Cisco Catalyst 3750X-48T-L | ||
Cisco Catalyst 3750x-48t-s | ||
Cisco Catalyst 3750X Switch | ||
Cisco Catalyst 3750X-48U-L | ||
Cisco Catalyst 3750X-48U-S | ||
Cisco Catalyst 4500 Supervisor Engine 6-E (k5) | ||
Cisco Catalyst 4500 Supervisor Engine 6-E | ||
Cisco Catalyst 4900M Switch | ||
Cisco Catalyst 4948e Ethernet Switch | ||
Cisco Catalyst 4948e-f Ethernet Switch | ||
Cisco Embedded Service 2020 | ||
Cisco Embedded Service 2020 | ||
Cisco Embedded Service 2020 | ||
Cisco Embedded Service 2020 | ||
Cisco Embedded Service 2020 | ||
Cisco Embedded Service 2020 | ||
Cisco Embedded Service 2020 | ||
Cisco Embedded Service 2020 | ||
Cisco IE 3010-16S-8PC Industrial Ethernet Switch | ||
Cisco IE 3010-24TC | ||
Cisco IE 2000 Series | ||
Cisco IE 2000 Series Switches | ||
Cisco IE 2000 Series Switches | ||
Cisco IE 2000-16TC | ||
Cisco IE 2000 Series | ||
Cisco IE 2000 Series | ||
Cisco IE 2000 Series | ||
Cisco IE 2000 Series | ||
Cisco IE 2000-24T67 | ||
Cisco IE 2000 Series | ||
Cisco IE 2000 Series | ||
Cisco IE 2000 Series | ||
Cisco IE 2000 Series Switches | ||
Cisco IE 2000 Series Switches | ||
Cisco IE 2000-8T67P | ||
Cisco IE 2000-8T67P | ||
Cisco IE 2000-8TC | ||
Cisco IE 2000 Series | ||
Cisco IE 2000-8TC-G-E | ||
Cisco IE 2000 Series | ||
Cisco IE 3000 | ||
Cisco IE 3000 | ||
Cisco IOS | =15.2\(2\)e4 | |
Cisco IOS | =15.2\(2a\)ja | |
Cisco Catalyst 2960-plus 24lc-l | ||
Cisco Catalyst 2960-plus 24lc-s | ||
Cisco Catalyst 2960-plus 24pc-l | ||
Cisco Catalyst 2960-Plus 24PC-S | ||
Cisco Catalyst 2960-plus 24tc-l | ||
Cisco Catalyst 2960-plus 48tc-s | ||
Cisco Catalyst 2960-plus 48pst-l | ||
Cisco Catalyst 2960-plus 48pst-s | ||
Cisco Catalyst 2960-plus 48tc-l | ||
Cisco Catalyst 2960-plus 48tc-s | ||
Cisco Catalyst 2960C-12PC-L | ||
Cisco Catalyst 2960CX-8PC-L | ||
Cisco Catalyst 2960c-8pc-l | ||
Cisco Catalyst 2960c-8tc-s | ||
Cisco Catalyst 2960CG-8TC-L | ||
Cisco Catalyst 2960cpd-8pt-l | ||
Cisco Catalyst 2960CPD-8TT-L | ||
Cisco Catalyst 2960S-24PD-L | ||
Cisco Catalyst 2960s-f24ps-l | ||
Cisco Catalyst 2960S-24TD-L | ||
Cisco Catalyst 2960S-24TS-L | ||
Cisco Catalyst 2960 Series | ||
Cisco Catalyst 2960s-48fpd-l | ||
Cisco Catalyst 2960-S 48 FPS-L | ||
Cisco Catalyst 2960S-48LPD-L | ||
Cisco Catalyst 2960S-48LPS-L | ||
Cisco Catalyst 2960S-48TD-L | ||
Cisco Catalyst 2960S-48TS-L | ||
Cisco Catalyst 2960S-48TS-S | ||
Cisco Catalyst 2960s-f24ps-l | ||
Cisco Catalyst 2960S-24TS-L | ||
Cisco Catalyst 2960S-24TS-L | ||
Cisco Catalyst 2960S-48FPS-L | ||
Cisco Catalyst 2960S-48LPS-L | ||
Cisco Catalyst 2960S-48TS-L | ||
Cisco Catalyst 2960S-48TS-S | ||
Cisco Catalyst 2960X Switch | ||
Cisco Catalyst 2960X-24PSQ-L | ||
Cisco Catalyst 2960X-24PSQ-L | ||
Cisco Catalyst 2960X Switch | ||
Cisco Catalyst 2960-X 24TS-L | ||
Cisco Catalyst 2960X-24TS-LL | ||
Cisco Catalyst 2960X Switch | ||
Cisco Catalyst 2960X-48FPS-L | ||
Cisco Catalyst 2960XR-48LPD-L | ||
Cisco Catalyst 2960X Switch | ||
Cisco Catalyst 2960X Switch | ||
Cisco Catalyst 2960X-48TS-LL | ||
Cisco Catalyst 2960X Switch | ||
Cisco Catalyst 2960XR-24PD-I | ||
Cisco Catalyst 2960-XR Series | ||
Cisco Catalyst 2960XR-24TD-I | ||
Cisco Catalyst 2960-XR Series | ||
Cisco Catalyst 2960XR-48FPD-I | ||
Cisco Catalyst 2960XR-48FPS-I | ||
Cisco Catalyst 2960XR-48LPD-I | ||
Cisco Catalyst 2960-XR 48LPS-I | ||
Cisco Catalyst 2960-XR Series | ||
Cisco Catalyst 2960XR 48TS-I | ||
Cisco Catalyst 3560c-12pc-s | ||
Cisco Catalyst 3560c-8pc-s | ||
Cisco Catalyst 3560cg-8pc-s | ||
Cisco Catalyst 3560cg-8tc-s | ||
Cisco Catalyst 3560cpd-8pt-s | ||
Cisco Catalyst 3560x-24p-e | ||
Cisco Catalyst 3560-X Series | ||
Cisco Catalyst 3560x-48p-s | ||
Cisco Catalyst 3560X-24T-E | ||
Cisco Catalyst 3560-X Series | ||
Cisco Catalyst 3560-X Series | ||
Cisco Catalyst 3560-X Series | ||
Cisco Catalyst 3560X-24T-L | ||
Cisco Catalyst 3560x-24u-s | ||
Cisco Catalyst 3560x-48p-e | ||
Cisco Catalyst 3560-X Series | ||
Cisco Catalyst 3560x-48p-s | ||
Cisco Catalyst 3560x-48pf-e | ||
Cisco Catalyst 3560x-48pf-l | ||
Cisco Catalyst 3560x-48pf-s | ||
Cisco Catalyst 3560X-48T-E | ||
Cisco Catalyst 3560-X 48T-L | ||
Cisco Catalyst 3560x-48t-s | ||
Cisco Catalyst 3560-X Series | ||
Cisco Catalyst 3560x-48u-l | ||
Cisco Catalyst 3560-X Series Switches | ||
Cisco Catalyst 3750x-12s-e | ||
Cisco Catalyst 3750X Switch Series | ||
Cisco Catalyst 3750x-24p-e | ||
Cisco Catalyst 3750X Switch | ||
Cisco Catalyst 3750x-24p-s | ||
Cisco Catalyst 3750X Switch | ||
Cisco Catalyst 3750x-24s-s | ||
Cisco Catalyst 3750X Switch | ||
Cisco Catalyst 3750x-24t-l | ||
Cisco Catalyst 3750X-24T-S | ||
Cisco Catalyst 3750-X | ||
Cisco Catalyst 3750X-24U-L | ||
Cisco Catalyst 3750-X Series Switch | ||
Cisco Catalyst 3750x-48p-e | ||
Cisco Catalyst 3750x-48p-l | ||
Cisco Catalyst 3750X Switch | ||
Cisco Catalyst 3750x-48pf-e | ||
Cisco Catalyst 3750x-48pf-l | ||
Cisco Catalyst 3750x-48pf-s | ||
Cisco Catalyst 3750X 48T-E | ||
Cisco Catalyst 3750X-48T-L | ||
Cisco Catalyst 3750x-48t-s | ||
Cisco Catalyst 3750X Switch | ||
Cisco Catalyst 3750X-48U-L | ||
Cisco Catalyst 3750X-48U-S | ||
Cisco Catalyst 4500 Supervisor Engine 6-E (k5) | ||
Cisco Catalyst 4500 Supervisor Engine 6-E | ||
Cisco Catalyst 4900M Switch | ||
Cisco Catalyst 4948e Ethernet Switch | ||
Cisco Catalyst 4948e-f Ethernet Switch | ||
Cisco Embedded Service 2020 | ||
Cisco Embedded Service 2020 | ||
Cisco Embedded Service 2020 | ||
Cisco Embedded Service 2020 | ||
Cisco Embedded Service 2020 | ||
Cisco Embedded Service 2020 | ||
Cisco Embedded Service 2020 | ||
Cisco Embedded Service 2020 | ||
Cisco IE 3010-16S-8PC Industrial Ethernet Switch | ||
Cisco IE 3010-24TC | ||
Cisco IE 2000 Series | ||
Cisco IE 2000 Series Switches | ||
Cisco IE 2000 Series Switches | ||
Cisco IE 2000-16TC | ||
Cisco IE 2000 Series | ||
Cisco IE 2000 Series | ||
Cisco IE 2000 Series | ||
Cisco IE 2000 Series | ||
Cisco IE 2000-24T67 | ||
Cisco IE 2000 Series | ||
Cisco IE 2000 Series | ||
Cisco IE 2000 Series | ||
Cisco IE 2000 Series Switches | ||
Cisco IE 2000 Series Switches | ||
Cisco IE 2000-8T67P | ||
Cisco IE 2000-8T67P | ||
Cisco IE 2000-8TC | ||
Cisco IE 2000 Series | ||
Cisco IE 2000-8TC-G-E | ||
Cisco IE 2000 Series | ||
Cisco IE 3000 | ||
Cisco IE 3000 | ||
Cisco IOS XE | =15.2\(2\)e4 | |
Cisco IOS XE | =15.2\(2a\)ja |
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CVE-2018-0156 is rated critical, as it can lead to a denial of service (DoS) condition.
Fix CVE-2018-0156 by applying the updated software versions provided by Cisco as per their advisory.
CVE-2018-0156 affects various versions of Cisco IOS and IOS XE software, specifically those running version 15.2(2)e4 and 15.2(2a)ja.
CVE-2018-0156 can be exploited by unauthenticated, remote attackers to initiate a device reload.
The impact of CVE-2018-0156 is significant as it results in a denial of service, causing the affected Cisco devices to reload.