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CVE-2018-0150

32
FAUCET Score

CVE-2018-0150 is a critical static credential vulnerability in Cisco IOS XE Software Release 16.x, affecting devices like the 4431 and 4451 Integrated Services Routers. An unauthenticated, remote attacker can exploit an undocumented user account with default credentials and privilege level 15. This allows for complete compromise of the device, as reflected by its CVSS score of 9.8 (Critical). While no public exploit code or active exploitation is confirmed, the vulnerability has garnered significant community discussion and media coverage, indicating high awareness.

Impacted Technologies

VendorProductVersion(s)CPE
16.5.1CPE matchmatch criteria
cpe:2.3:o:cisco:ios_xe:16.5.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.82%
Probability of exploitation in next 30 days
EPSS Percentile
91.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0482 is in the 85th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscoworkaround availablevia nvd_reference
View patch

References

tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-xesc
MitigationVendor Advisory
securityfocus.com / bid/103539
Third Party AdvisoryVDB Entry
securitytracker.com / id/1040579
MitigationThird Party AdvisoryVDB Entry