A vulnerability in the FTP server of the Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to log in to th…

Published 8 y ago 2018-03-08 · modified 4 mo ago 2026-06-17 · JSON

CVSS

5.6

v3.0 · NVD

CISA KEV

not known exploited

EPSS

1.8%

percentile 79%

Public exploits

none known

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.

CISA SSVC assessment

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 23 mo ago 2024-12-02

Exploit prediction (EPSS)

1.84% probability of exploitation in the next 30 days, higher than 79% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
NVD	3.0	5.6	`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L`
NVD	2.0	6.8	`AV:N/AC:M/Au:N/C:P/I:P/A:P`

Affected products

n/a Cisco Web Security Appliance

Classification

Weakness

CWE-287 Improper Authentication

References

securityfocus.com /bid/103407 · vdb-entry, x_refsource_BID, x_transferred
tools.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-20180307-wsa · x_refsource_CONFIRM, x_transferred
securitytracker.com /id/1040464 · vdb-entry, x_refsource_SECTRACK, x_transferred

Sources

CVE List: CVE-2018-0087
NVD: CVE-2018-0087

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.

Summary