Security readout for executives and security teams
Plain-English summary
CVE-2021-3045 affects the Palo Alto Networks PAN-OS web interface. A logged-in administrator could use the flaw to read arbitrary files from the device file system. The business risk is sensitive configuration or operational data exposure, but exploitation requires administrator privileges, which limits urgency compared with unauthenticated firewall vulnerabilities.
Executive priority
Treat this as a scheduled but important firewall maintenance item. Prioritize affected management-plane systems, especially where many administrators have access or management interfaces are broadly reachable.
Technical view
The issue is an OS command argument injection vulnerability, CWE-88, in the PAN-OS web interface. It affects PAN-OS 8.1 before 8.1.19, 9.0 before 9.0.14, and 9.1 before 9.1.10. PAN-OS 10.0 and later are not impacted. CVSS 3.1 is 4.9 with network access, low complexity, high privileges, and high confidentiality impact.
Likely exposure
Exposure is limited to organizations running affected PAN-OS 8.1, 9.0, or 9.1 releases where the web interface is reachable by authenticated administrators. PAN-OS 10.0 and later are stated as not impacted.
Exploitation context
The supplied sources do not cite active exploitation, and the CVE is not marked KEV. Exploitation requires authenticated administrator access, so compromised or misused admin accounts are the main practical concern.
Researcher notes
Evidence supports arbitrary file read through authenticated administrator interaction with the PAN-OS web interface. The source bundle does not provide exploit details, public exploitation evidence, or additional affected products beyond PAN-OS.
Mitigation direction
- Upgrade PAN-OS 8.1 to 8.1.19 or later.
- Upgrade PAN-OS 9.0 to 9.0.14 or later.
- Upgrade PAN-OS 9.1 to 9.1.10 or later.
- Confirm upgrade guidance against the Palo Alto Networks advisory.
- Restrict management web interface access to trusted administrators.
Validation and detection
- Inventory PAN-OS versions across all managed firewalls.
- Identify devices running affected 8.1, 9.0, or 9.1 builds.
- Confirm PAN-OS 10.0 or later devices are excluded.
- Review administrative access paths to the web interface.
- Check admin activity for unexpected or suspicious authenticated use.
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-88: 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 lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-3045 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
- 4.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/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:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N1.23.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.9MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://security.paloaltonetworks.com/CVE-2021-3045CVE reference · x_refsource_MISC
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 Argument Delimiters in a Command ('Argument Injection')
Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.