TI-2019-01298 Aliases CVE-2019-1672 GHSA-xgwc-rmqj-wxqr

Cisco Web Security Appliance Decryption Policy Bypass Vulnerability

LOW 35CWE-400Published 2019-02-08 · Updated 2024-11-19

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.0 · CNA. Fix status from CNA. Impact type from CWE-400.

Summary

A vulnerability in the Decryption Policy Default Action functionality of the Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to bypass a configured drop policy and allow traffic onto the network that should have been denied. The vulnerability is due to the incorrect handling of SSL-encrypted traffic when Decrypt for End-User Notification is disabled in the configuration. An attacker could exploit this vulnerability by sending a SSL connection through the affected device. A successful exploit could allow the attacker to bypass a configured drop policy to block specific SSL connections. Releases 10.1.x and 10.5.x are affected.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.01645 76th 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: Yes
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 Web Security Appliance (WSA)	10.1; 10.5	—	No fix listed	CNA

Cisco Web Security Appliance (WSA) VendorCisco Affected 10.1; 10.5 Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPE	Versions	Role	Vendor
cpe:2.3:a:cisco:web_security_appliance:10.1.0-204:::::::*	10.1.0-204	Vulnerable	Cisco
cpe:2.3:a:cisco:web_security_appliance:10.5.2-072:::::::*	10.5.2-072	Vulnerable	Cisco
cpe:2.3:a:cisco:web_security_appliance:11.5.1-fcs-115:::::::*	11.5.1-fcs-115	Vulnerable	Cisco

cpe:2.3:a:cisco:web_security_appliance:10.1.0-204:*:*:*:*:*:*:* Versions 10.1.0-204 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-115:*:*:*:*:*:*:* Versions 11.5.1-fcs-115 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2019-1672
2026-10-03 Alias added: GHSA-xgwc-rmqj-wxqr

References

Advisory 1

20190206 Cisco Web Security Appliance Decryption Policy Bypass Vulnerability

TI-2023-06741 Buffer overflow in Cisco Secure Web Appliance CVSS 3.1CRITICAL 9.8
TI-2018-00369 Uncontrolled resource consumption in Cisco AsyncOS Software for Cisco Web Security… CVSS 3.0HIGH 8.6
TI-2019-01508 Cisco Web Security Appliance HTTPS Certificate Denial of Service Vulnerability CVSS 3.1HIGH 8.6
TI-2018-00312 A vulnerability in traffic-monitoring functions in Cisco Web Security Appliance (WSA)… CVSS 3.0HIGH 7.5
TI-2021-01086 Cisco Web Security Appliance Privilege Escalation Vulnerability CVSS 3.1HIGH 8.8
TI-2019-11999 Cisco Web Security Appliance Unauthorized Device Reset Vulnerability CVSS 3.1HIGH 8.8

See all 64 →

Sources

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