What is CVE-2018-0410?

CVE-2018-0410 is a high-severity vulnerability in Cisco Web Security Appliance, classified under Uncontrolled Resource Consumption. CVSS score: 8.6/10. Published 2018-08-15.

How severe is CVE-2018-0410?

High severity. CVSS v3 base score is 8.6 out of 10.

Resource exhaustion in Cisco Web Security Appliance

CVE-2018-0410

A vulnerability in the web proxy functionality of Cisco AsyncOS Software for Cisco Web Security Appliances could allow an unauthenticated, remote attacker to exhaust system memory and cause a denial of service (DoS) condition on an affected system. The vulnerability exists because the affected software improperly manages memory resources for TCP connections to a targeted device. An attacker could exploit this vulnerability by establishing a high number of TCP connections to the data interface of an affected device via IPv4 or IPv6. A successful exploit could allow the attacker to exhaust system memory, which could cause the system to stop processing new connections and result in a DoS condition. System recovery may require manual intervention. Cisco Bug IDs: CSCvf36610.

Vulnerability class: DoS (Denial of Service)

Published 2018-08-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.041 (90.6th percentile), scored 2026-10-21.

Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.037 · newest: 0.041 · change: +0.003

Affected products

Cisco Web Security Appliance — versions 9.1.1-074, 9.1.2-010, 9.1.2-022
Cisco Systems, Inc. Asyncos Software For Web Security Appliances — versions unspecified

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

www.securityfocus.com/bid/105098 (VDB Entry, Third Party Advisory, vdb-entry)
tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180815… (vendor-advisory, Vendor Advisory)
www.securitytracker.com/id/1041535 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2018-0410?: CVE-2018-0410 is a high-severity vulnerability in Cisco Web Security Appliance, classified under Uncontrolled Resource Consumption. CVSS score: 8.6/10. Published 2018-08-15.
How severe is CVE-2018-0410?: High severity. CVSS v3 base score is 8.6 out of 10.