Security readout for executives and security teams
This flaw can make a Cisco Web Security Appliance proxy process restart when it handles a malformed SSL server certificate during HTTPS decryption. The business impact is availability: web access filtering and proxy service can be disrupted without attacker authentication. Exposure is most likely where Cisco Web Security Appliance is deployed with HTTPS decryption enabled. The bundle does not specify affected software versions, deployment prerequisites beyond the feature, or internet-facing requirements. Treat this as a high-priority availability risk for environments dependent on Cisco WSA. It is not described as data theft or code execution, but repeated proxy restarts could disrupt web access and security inspection. Mitigation focus: Inventory Cisco WSA deployments and identify appliances using HTTPS decryption.; Review the Cisco advisory for affected releases, fixed software, and vendor-approved workarounds.; Prioritize remediation for appliances supporting critical web access paths..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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Open ATT&CK lookupCVE-2019-1886 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 8.6 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
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CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H3.94Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.6HighVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20190703 Cisco Web Security Appliance HTTPS Certificate Denial of Service VulnerabilityCVE reference · vendor-advisory, x_refsource_CISCO
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.