TI-2018-00062 Aliases CVE-2018-0087 GHSA-9p96-pf4v-v529

Improper authentication in Cisco Web Security Appliance

LOW 29CWE-287Published 2018-03-08 · Updated 2024-12-02

Key facts

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

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-287.

Summary

A vulnerability in the FTP server of the Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to log in to the FTP server of the device without a valid password. The attacker does need to have a valid username. The vulnerability is due to incorrect FTP user credential validation. An attacker could exploit this vulnerability by using FTP to connect to the management IP address of the targeted device. A successful exploit could allow the attacker to log in to the FTP server of the Cisco WSA without having a valid password. This vulnerability affects Cisco AsyncOS for WSA Software on both virtual and hardware appliances that are running any release of Cisco AsyncOS 10.5.1 for WSA Software. The device is vulnerable only if FTP is enabled on the management interface. FTP is disabled by default. Cisco Bug IDs: CSCvf74281.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01837 79th 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: Partial

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	Cisco Web Security Appliance	—	No fix listed	CNA

Cisco Web Security Appliance Vendor— Affected Cisco Web Security Appliance Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:o:cisco:asyncos:10.5.1-296:::::::*	10.5.1-296	Vulnerable	Cisco

cpe:2.3:o:cisco:asyncos:10.5.1-296:*:*:*:*:*:*:* Versions 10.5.1-296 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2018-0087
2026-10-03 Alias added: GHSA-9p96-pf4v-v529

References

Advisory 1

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180307-wsa

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Sources

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