Security readout for executives and security teams
Plain-English summary
Cisco WebEx Meetings for iOS had weak SSL certificate validation. A remote unauthenticated attacker who could supply an invalid certificate could potentially intercept and read confidential Webex traffic. The public data rates this as medium severity, mainly because confidentiality impact is high but exploitation complexity is high.
Executive priority
Treat this as a targeted confidentiality risk, not a broad outage risk. Prioritize verification and updating for iOS users who handle sensitive meetings or connect from untrusted networks.
Technical view
This is a CWE-295 certificate validation issue in Cisco WebEx Meetings for iOS. The CVSS v3.0 vector is AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N. Successful exploitation could enable man-in-the-middle decryption of user connections, with no stated integrity or availability impact.
Likely exposure
Exposure appears limited to Cisco WebEx Meetings for iOS installations. The provided sources do not specify affected or fixed version ranges, so organizations should confirm deployed iOS app versions against Cisco’s advisory and mobile device inventory.
Exploitation context
The source bundle does not indicate known active exploitation, and the CVE is not listed as KEV. Exploitation requires a network-positioned scenario capable of presenting a crafted or invalid SSL certificate to an affected device.
Researcher notes
Evidence supports certificate validation weakness, high confidentiality impact, high attack complexity, and no integrity or availability impact. Public sources provided here do not include exploit code, observed exploitation, or explicit version ranges.
Mitigation direction
- Review Cisco’s advisory for affected and fixed WebEx Meetings for iOS versions.
- Update affected iOS WebEx clients using vendor-supported guidance.
- Prioritize managed devices used for executive, legal, customer, or sensitive meetings.
- Reduce sensitive Webex use on untrusted networks until clients are confirmed fixed.
Validation and detection
- Inventory Cisco WebEx Meetings for iOS installations through MDM or endpoint records.
- Compare installed versions with Cisco advisory guidance.
- Check whether unmanaged iOS devices are used for sensitive Webex meetings.
- Document remediation status for devices that cannot be verified.
Public sources used
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
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-295: Exact CWE lookup
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Open ATT&CK lookupCVE-2019-1948 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
- 5.9 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
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:H/PR:N/UI:N/S:U/C:H/I:N/A:N2.23.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.9MediumVector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20190821 Cisco Webex Meetings Mobile (iOS) SSL Certificate Validation 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 Certificate Validation
Improper Certificate Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.