TI-2018-00387 Aliases CVE-2018-0428 GHSA-pc4c-2gp7-ch65

Improper access control in Cisco Web Security Appliance

LOW 32CWE-284Published 2018-08-15 · Updated 2024-11-26

Key facts

Attack vector: Local
Privileges required: High
User interaction: None
Attack complexity: Low
Impact type: Security bypass, Privilege escalation
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-284 and CWE-269.

Summary

A vulnerability in the account management subsystem of Cisco Web Security Appliance (WSA) could allow an authenticated, local attacker to elevate privileges to root. The attacker must authenticate with valid administrator credentials. The vulnerability is due to improper implementation of access controls. An attacker could exploit this vulnerability by authenticating to the device as a specific user to gain the information needed to elevate privileges to root in a separate login shell. A successful exploit could allow the attacker to escape the CLI subshell and execute system-level commands on the underlying operating system as root. Cisco Bug IDs: CSCvj93548.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00436 38th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Cisco	Web Security Appliance	all versions	—	No fix listed	CNA

Web Security Appliance VendorCisco Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:h:cisco:web_security_appliance:11.0.0-fcs-250:::::::*	11.0.0-fcs-250	Vulnerable	Cisco
cpe:2.3:h:cisco:web_security_appliance:11.5.0-fcs-000:::::::*	11.5.0-fcs-000	Vulnerable	Cisco
cpe:2.3:h:cisco:web_security_appliance:wsa10.0.0-959:::::::*	wsa10.0.0-959	Vulnerable	Cisco
cpe:2.3:h:cisco:web_security_appliance:wsa10.5.0-fcs-000:::::::*	wsa10.5.0-fcs-000	Vulnerable	Cisco

cpe:2.3:h:cisco:web_security_appliance:11.0.0-fcs-250:*:*:*:*:*:*:* Versions 11.0.0-fcs-250 Vulnerable ·Cisco
cpe:2.3:h:cisco:web_security_appliance:11.5.0-fcs-000:*:*:*:*:*:*:* Versions 11.5.0-fcs-000 Vulnerable ·Cisco
cpe:2.3:h:cisco:web_security_appliance:wsa10.0.0-959:*:*:*:*:*:*:* Versions wsa10.0.0-959 Vulnerable ·Cisco
cpe:2.3:h:cisco:web_security_appliance:wsa10.5.0-fcs-000:*:*:*:*:*:*:* Versions wsa10.5.0-fcs-000 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2018-0428
2026-10-03 Alias added: GHSA-pc4c-2gp7-ch65

References

Advisory 1

20180815 Cisco Web Security Appliance Privilege Escalation Vulnerability

TI-2023-06741 Buffer overflow in Cisco Secure Web Appliance CVSS 3.1CRITICAL 9.8
TI-2018-00369 Uncontrolled resource consumption in Cisco AsyncOS Software for Cisco Web Security… CVSS 3.0HIGH 8.6
TI-2019-01508 Cisco Web Security Appliance HTTPS Certificate Denial of Service Vulnerability CVSS 3.1HIGH 8.6
TI-2018-00312 A vulnerability in traffic-monitoring functions in Cisco Web Security Appliance (WSA)… CVSS 3.0HIGH 7.5
TI-2021-01086 Cisco Web Security Appliance Privilege Escalation Vulnerability CVSS 3.1HIGH 8.8
TI-2019-11999 Cisco Web Security Appliance Unauthorized Device Reset Vulnerability CVSS 3.1HIGH 8.8

See all 64 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences