TI-2019-01498 Aliases CVE-2019-1876 GHSA-q2wg-6xqh-962p

Cisco Wide Area Application Services Software HTTPS Proxy Authentication Bypass Vulnerability

LOW 28CWE-306Published 2019-06-20 · Updated 2024-11-21

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: None · Low · None
Fix status: Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-306.

Summary

A vulnerability in the HTTPS proxy feature of Cisco Wide Area Application Services (WAAS) Software could allow an unauthenticated, remote attacker to use the Central Manager as an HTTPS proxy. The vulnerability is due to insufficient authentication of proxy connection requests. An attacker could exploit this vulnerability by sending a malicious HTTPS CONNECT message to the Central Manager. A successful exploit could allow the attacker to access public internet resources that would normally be blocked by corporate policies.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01774 78th percentileScored 2026-11-07

Fix Fixed Cisco Wide Area Application Services (WAAS) (Cisco): 6.4(5.6)

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	Cisco Wide Area Application Services (WAAS)	before 6.4(5.6)	6.4(5.6)	Patch available	CNA

Cisco Wide Area Application Services (WAAS) VendorCisco Affected before 6.4(5.6) Fixed in 6.4(5.6) Patch available CNA

CPE configurations NVD · 3

CPE	Versions	Role	Vendor
cpe:2.3:a:cisco:wide_area_application_services:5.5\(7\):::::::*	5.5(7)	Vulnerable	Cisco
cpe:2.3:a:cisco:wide_area_application_services:6.1\(1\):::::::*	6.1(1)	Vulnerable	Cisco
cpe:2.3:a:cisco:wide_area_application_services:6.4\(3b\):::::::*	6.4(3b)	Vulnerable	Cisco

cpe:2.3:a:cisco:wide_area_application_services:5.5\(7\):*:*:*:*:*:*:* Versions 5.5(7) Vulnerable ·Cisco
cpe:2.3:a:cisco:wide_area_application_services:6.1\(1\):*:*:*:*:*:*:* Versions 6.1(1) Vulnerable ·Cisco
cpe:2.3:a:cisco:wide_area_application_services:6.4\(3b\):*:*:*:*:*:*:* Versions 6.4(3b) Vulnerable ·Cisco

Remediation

Fix · CNA Cisco Wide Area Application Services (WAAS) (Cisco) Fixed in 6.4(5.6)

Timeline

2026-10-02 Threatist record created from CVE-2019-1876
2026-10-03 Alias added: GHSA-q2wg-6xqh-962p

References

Advisory 1

20190619 Cisco Wide Area Application Services Software HTTPS Proxy Authentication Bypass Vulnerability

TI-2013-03008 The web service framework in Cisco WAAS Software 4.x and 5.x before 5.0.3e, 5.1.x before… CVSS 2.0HIGH 10.0
TI-2013-03009 The web framework in Cisco WAAS Software before 4.x and 5.x before 5.0.3e, 5.1.x before… CVSS 2.0HIGH 9.0
TI-2014-01739 Cisco Wide Area Application Services (WAAS) 5.1.1 before 5.1.1e, when SharePoint prefetch… CVSS 2.0HIGH 9.3
TI-2007-03800 The Common Internet File System (CIFS) optimization in Cisco Wide Area Application… CVSS 2.0HIGH 7.8
TI-2015-05404 cifs-ao in the CIFS optimization functionality on Cisco Wide Area Application Service… CVSS 3.0HIGH 7.5
TI-2018-00288 Hard-coded credentials in Cisco Wide Area Application Services unknown CVSS 3.1MEDIUM 5.3

See all 19 →

Sources

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