Security readout for executives and security teams
Plain-English summary
CVE-2019-12669 can let a remote, unauthenticated attacker crash or disrupt an affected Cisco IOS XE device by triggering a Cisco TrustSec RADIUS Change of Authorization handling flaw. The impact is availability only, but affected network devices may support important connectivity, so outages can have business impact.
Executive priority
Treat this as a moderate operational resilience issue. It is not a data theft flaw, but disruption to affected Cisco infrastructure can affect business services. Prioritize based on device criticality and vendor-confirmed exposure.
Technical view
The issue is improper input handling in Cisco TrustSec RADIUS CoA code. A malformed packet can cause a denial-of-service condition on an affected device. The supplied affected entry names Cisco IOS XE Software 3.2.9SG. CVSS 3.0 is 6.8 with network attack vector, high complexity, no privileges, no user interaction, and high availability impact.
Likely exposure
Exposure is most likely where affected Cisco IOS XE devices run Cisco TrustSec/RADIUS CoA functionality and are reachable over the network. The provided data only names Cisco IOS XE Software 3.2.9SG, so teams should verify exact affected releases against Cisco’s advisory.
Exploitation context
The bundle describes unauthenticated remote exploitation through a malformed packet, but also rates attack complexity high. There is no KEV listing in the provided data and no cited evidence of active exploitation, public weaponization, or broad exploitation campaigns.
Researcher notes
Evidence is limited to CVE data and Cisco’s advisory reference. Do not assume affected releases beyond the supplied Cisco IOS XE 3.2.9SG entry without checking Cisco’s advisory. No source in the bundle confirms exploitation in the wild.
Mitigation direction
- Review Cisco advisory for fixed software, workarounds, and affected-release details.
- Inventory Cisco IOS XE devices and identify Cisco TrustSec/RADIUS CoA usage.
- Prioritize remediation for affected devices supporting critical network paths.
- Limit untrusted network reachability to relevant device services where feasible.
- Monitor affected devices for unexpected reloads or availability loss.
Validation and detection
- Confirm software version against Cisco’s advisory and local asset inventory.
- Verify whether Cisco TrustSec/RADIUS CoA is enabled on candidate devices.
- Review network monitoring for DoS symptoms or unexpected device restarts.
- Check change records for applied Cisco fixes or vendor-approved mitigations.
- Document remaining exposed devices and remediation ownership.
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-20: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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-2019-12669 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
- 6.8 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
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:C/C:N/I:N/A:H2.24Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
6.8MediumVector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20190925 Cisco IOS and IOS XE Software Change of Authorization 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.