Security readout for executives and security teams
This flaw could let a remote, unauthenticated sender get an email attachment past Cisco ESA content filters by wrapping it in a crafted GZIP file. The main business risk is loss of an email security control: messages that should be dropped may reach users or downstream systems. Exposure is limited to organizations running Cisco Email Security Appliance with AsyncOS Software version 12.0 and relying on configured content filters to drop matching email content. Treat as a moderate email-security control failure. Remediate during normal security patch cycles, faster if ESA is a primary control for malware, data-loss, or compliance filtering. Mitigation focus: Identify all Cisco ESA appliances and their AsyncOS versions.; Review Cisco's advisory for fixed-release or workaround guidance.; Prioritize remediation where ESA drops high-risk attachments or regulated content..
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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ATT&CK lookup starting points
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Open ATT&CK lookupCVE-2019-1905 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
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:L/A:N3.91.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.8MediumVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20190619 Cisco Email Security Appliance GZIP Content Filter Bypass 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.