Security readout for executives and security teams
Plain-English summary
Cisco Enterprise Chat and Email had a flaw that could let an unauthenticated remote attacker download chat-session attachments belonging to other users. The main business risk is exposure of sensitive files shared through customer support or chat workflows, not system takeover.
Executive priority
Treat as a targeted data exposure issue. Prioritize remediation for customer-facing or support environments where sensitive documents may be exchanged through chat attachments.
Technical view
CVE-2019-1877 is an insufficient-authentication issue in the Cisco Enterprise Chat and Email HTTP API file download function. A crafted API request could allow remote unauthenticated access to files attached through chat sessions. Cisco states versions before 12.0(1)ES1 are affected.
Likely exposure
Exposure is most likely where Cisco Enterprise Chat and Email versions earlier than 12.0(1)ES1 are deployed and the chat attachment feature is used or reachable through the HTTP API.
Exploitation context
The source bundle does not cite active exploitation, and CISA KEV status is false. Exploitation requires access to the vulnerable API and depends on attachments existing in chat sessions.
Researcher notes
The issue maps to CWE-200 and has CVSS 3.0 score 6.5 with high confidentiality impact. The bundle names no integrity or availability impact. Avoid assuming broader file access beyond chat-session attachments.
Mitigation direction
- Identify Cisco Enterprise Chat and Email deployments and versions.
- Upgrade affected deployments to 12.0(1)ES1 or later per Cisco guidance.
- Review Cisco’s advisory for any deployment-specific workarounds or constraints.
- Limit external access to the affected HTTP API where operationally feasible.
Validation and detection
- Confirm installed Cisco Enterprise Chat and Email version against the Cisco advisory.
- Inventory whether chat file attachments are enabled or used.
- Review web/API access logs for unusual attachment download activity.
- Validate that unauthenticated users cannot retrieve other users’ chat attachments.
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-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2019-1877 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
- 6.5 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/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:L/PR:N/UI:R/S:U/C:H/I:N/A:N2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
6.5MediumVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- 20190619 Cisco Enterprise Chat and Email Attachment Download 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.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.