Security readout for executives and security teams
Plain-English summary
CVE-2023-20273 affects Cisco IOS XE web UI. A logged-in remote attacker with high privileges could submit crafted input that runs operating-system commands as root. This turns an already privileged web UI account into full device-level control. CISA lists it in KEV, so treat affected devices as urgent.
Executive priority
High priority. This is not a low-skill unauthenticated bug, but it affects network infrastructure and can give root-level control after privileged web UI access. KEV status means remediation should be handled as active risk, not routine patching.
Technical view
Cisco describes an authenticated command injection flaw in IOS XE Software web UI caused by insufficient input validation. The CVSS 3.1 score is 7.2 with network access, low complexity, high privileges required, no user interaction, and high confidentiality, integrity, and availability impact. The mapped weakness is CWE-78.
Likely exposure
Exposure is limited to Cisco IOS XE Software versions listed as affected, especially devices where the web UI is enabled and reachable by administrators or management networks. High privileges are required, so stolen or misused administrative credentials materially increase risk.
Exploitation context
The source bundle marks this CVE as CISA KEV, which supports known exploitation. The provided evidence does not include exploit volume, actor attribution, or reliable public exploit details. Do not assume unauthenticated exploitation; the CVSS vector requires high privileges.
Researcher notes
The key boundary is authenticated, high-privilege access through IOS XE web UI. Evidence supports command injection as root, CWE-78, and known exploitation via CISA KEV. The bundle does not provide fixed-version detail, exploit telemetry, or alternate affected Cisco products.
Mitigation direction
- Check Cisco’s advisory for fixed IOS XE releases or official workarounds.
- Prioritize internet-reachable or broadly reachable web UI management planes.
- Restrict web UI access to trusted management paths where operationally possible.
- Review privileged IOS XE web UI accounts for compromise or misuse.
- Accelerate remediation for affected versions because CISA KEV indicates exploitation.
Validation and detection
- Inventory Cisco IOS XE devices and compare versions with the affected list.
- Confirm whether the IOS XE web UI is enabled and remotely reachable.
- Review authentication logs for unusual privileged web UI access.
- Check device integrity and configuration changes after suspicious admin activity.
- Track remediation status against Cisco’s official advisory guidance.
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-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. 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-2023-20273 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
- High
- CVSS
- 7.2 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/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.
CISA KEV status
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:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H1.25.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.2HighVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- cisco-sa-iosxe-webui-privesc-j22SaA4zCVE reference
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-20273CVE reference · government-resource
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 Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.