The HTTPS Proxy feature in Cisco AsyncOS before 8.5.3-051 and 9.x before 9.0.0-485 on Web…
Priority LOW 28CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA.
Summary
The HTTPS Proxy feature in Cisco AsyncOS before 8.5.3-051 and 9.x before 9.0.0-485 on Web Security Appliance (WSA) devices allows remote attackers to cause a denial of service (service outage) by leveraging certain intranet connectivity and sending a malformed HTTPS request, aka Bug ID CSCuu24840.
Why it matters now
EPSS 0.01739 77th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2016-1288
- 2026-10-03 Alias added: GHSA-rq33-86v9-3777
References
More Cisco Web Security Appliance vulnerabilities
- 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
Sources
- CVE-2016-1288 · CVE Program
- CVE-2016-1288 · NVD
- FIRST EPSS
- GHSA-rq33-86v9-3777 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences