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TI-2019-01506 Aliases CVE-2019-1884GHSA-jpm3-6rm2-fhgg

Cisco Web Security Appliance Web Proxy Denial of Service Vulnerability

Priority LOW 37CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.0 · CNA. Fix status from CNA.

Summary

A vulnerability in the web proxy functionality of Cisco AsyncOS Software for Cisco Web Security Appliance (WSA) could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient input validation mechanisms for certain fields in HTTP/HTTPS requests sent through an affected device. A successful attacker could exploit this vulnerability by sending a malicious HTTP/HTTPS request through an affected device. An exploit could allow the attacker to force the device to stop processing traffic, resulting in a DoS condition.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01485 74th percentileScored 2026-11-07
Fix Fixed Cisco Web Security Appliance (WSA) (Cisco): 10.5.5-005

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

VendorProductAffected versionsFixed inStatusSource
CiscoCisco Web Security Appliance (WSA)before 10.5.5-00510.5.5-005Patch availableCNA
  • Cisco Web Security Appliance (WSA) VendorCisco Affected before 10.5.5-005 Fixed in 10.5.5-005 Patch available CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:*10.1 to before 10.5.5-005; 11.5 to before 11.5.2-020; 11.7 to before 11.7.0-407VulnerableCisco
cpe:2.3:a:cisco:web_security_appliance:10.1.4-017:*:*:*:*:*:*:*10.1.4-017VulnerableCisco
cpe:2.3:a:cisco:web_security_appliance:10.5.2-072:*:*:*:*:*:*:*10.5.2-072VulnerableCisco
cpe:2.3:a:cisco:web_security_appliance:11.5.1-fcs-125:*:*:*:*:*:*:*11.5.1-fcs-125VulnerableCisco
cpe:2.3:a:cisco:web_security_appliance:11.7.0-256:*:*:*:*:*:*:*11.7.0-256VulnerableCisco
  • cpe:2.3:o:cisco:asyncos:*:*:*:*:*:*:*:* Versions 10.1 to before 10.5.5-005; 11.5 to before 11.5.2-020; 11.7 to before 11.7.0-407 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:web_security_appliance:10.1.4-017:*:*:*:*:*:*:* Versions 10.1.4-017 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:web_security_appliance:10.5.2-072:*:*:*:*:*:*:* Versions 10.5.2-072 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:web_security_appliance:11.5.1-fcs-125:*:*:*:*:*:*:* Versions 11.5.1-fcs-125 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:web_security_appliance:11.7.0-256:*:*:*:*:*:*:* Versions 11.7.0-256 Vulnerable ·Cisco

Remediation

  • Fix · CNA Cisco Web Security Appliance (WSA) (Cisco) Fixed in 10.5.5-005

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Cisco Web Security Appliance (WSA) 10.5.5-005

    2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2019-01508 Cisco Web Security Appliance HTTPS Certificate Denial of Service VulnerabilityPriority MEDIUM 46
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-1884
  2. 2026-10-03 Alias added: GHSA-jpm3-6rm2-fhgg

References

Advisory 1

  • TI-2026-74174 Arbitrary file write in Cisco Secure Email Gateway via AMP feature KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-53489 Cisco Secure Email Gateway SQL Injection Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-14683 Cisco Secure Email Gateway and Cisco Secure Email and Web Manager Remote Command Execution Vulnerability KEVCVSS 3.1CRITICAL 10.0
  • TI-2021-13698 Cisco Web Security Appliance Proxy Service Denial of Service Vulnerability CVSS 3.1HIGH 8.6
  • TI-2018-11020 Cisco Email Security Appliance URL Filtering Denial of Service Vulnerability CVSS 3.1HIGH 8.6
  • TI-2019-01567 Cisco Email Security Appliance Denial of Service Vulnerability CVSS 3.1HIGH 8.6
See all 55 →

Sources

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