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CVE-2018-0150

CRITICAL
9.8
CVSS Score
Published: March 28, 2018 at 10:00 PM UTC
Updated: June 17, 2026 at 01:29 AM UTC
3 products affected across 1 vendorIOS Xe4431 Integrated Services Router4451 Integrated Services Router

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Severity
CRITICAL9.8
Exploit prediction
EPSS 5%
SSVC
No known exploit

Description

A vulnerability in Cisco IOS XE Software could allow an unauthenticated, remote attacker to log in to a device running an affected release of Cisco IOS XE Software with the default username and password that are used at initial boot, aka a Static Credential Vulnerability. The vulnerability is due to an undocumented user account with privilege level 15 that has a default username and password. An attacker could exploit this vulnerability by using this account to remotely connect to an affected device. A successful exploit could allow the attacker to log in to the device with privilege level 15 access. This vulnerability affects Cisco devices that are running a vulnerable release of Cisco IOS XE Software Release 16.x. This vulnerability does not affect Cisco IOS XE Software releases prior to Release 16.x. Cisco Bug IDs: CSCve89880.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

IOS Xe· Cisco
95%
16.5.1
cisco-4431-integrated-services-router (environment) · cisco-4451-integrated-services-router (environment)
4431 Integrated Services Router· Ciscodevice
80%
All versions
4451 Integrated Services Router· Ciscodevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

VDB Entryx_refsource_BIDThird Party Advisory
Source: [email protected]
http://www.securityfocus.com/bid/103539
VDB Entryx_refsource_SECTRACKMitigationThird Party Advisory
Source: [email protected]
http://www.securitytracker.com/id/1040579
x_refsource_CONFIRMMitigationVendor Advisory
Source: [email protected]
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-xesc

SSVC — Action Prioritization

SSVCNo known exploitAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.8CRITICAL[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-798

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