Security readout for executives and security teams
Plain-English summary
This flaw affects Cisco ASA and FTD upgrade handling on Firepower 1000 and 2100 appliances. A highly privileged local attacker could submit a malicious upgrade package and run commands as root. It is not a remote internet drive-by issue, but it can turn administrative access into full control of the underlying OS.
Executive priority
Treat this as a targeted infrastructure-control risk, not a mass internet emergency. Prioritize validation on Cisco firewall appliances because successful exploitation can grant root-level control, but the attack requires local authenticated access with high privileges.
Technical view
CVE-2021-1488 is a CWE-77 command injection issue caused by insufficient input validation during the ASA/FTD upgrade process. The CVSS 3.1 vector is local, low complexity, high privileges required, no user interaction, with high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most relevant to organizations operating Cisco ASA or FTD Software on Firepower 1000 or 2100 Series appliances. The provided bundle does not list affected or fixed version ranges, so teams must verify exact applicability against Cisco's advisory.
Exploitation context
The sources describe exploitation by an authenticated local attacker uploading a crafted upgrade package. CISA KEV status is false in the bundle, and no cited source here reports active exploitation. The privilege requirement materially limits broad exploitation but not insider, compromised-admin, or appliance-management scenarios.
Researcher notes
The source bundle confirms the flaw class, affected Cisco product family, required privilege level, and root-impact outcome. It does not provide version matrices, patch identifiers, workarounds, or exploit-in-the-wild evidence; those details should be taken from Cisco's advisory before making remediation decisions.
Mitigation direction
- Review Cisco's advisory for affected and fixed software releases.
- Upgrade or follow Cisco guidance where the advisory applies.
- Restrict upgrade-package upload rights to trusted administrators only.
- Use change control for firewall and security appliance upgrades.
- Monitor appliance administrative activity for unexpected upgrade attempts.
Validation and detection
- Inventory Firepower 1000 and 2100 appliances running ASA or FTD.
- Compare installed software versions with Cisco's advisory.
- Review administrator accounts with local upgrade privileges.
- Check audit logs for unauthorized or unusual upgrade activity.
- Confirm upgrade packages came from trusted vendor sources.
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-77: 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-1488 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
- 6.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/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.
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:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H0.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.7MediumVector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- 20210428 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software for Firepower 1000 and 2100 Series Appliances Command Injection 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 Neutralization of Special Elements used in a Command ('Command Injection')
Improper Neutralization of Special Elements used in a Command ('Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.