Security readout for executives and security teams
Plain-English summary
Adobe RoboHelp 2020.0.3 and earlier has a local privilege escalation issue caused by unsafe search path handling. It is not a remote internet-facing flaw. The attacker already needs high privileges to write to the file system, so urgency is moderate and mainly affects managed workstations or build/documentation systems running RoboHelp.
Executive priority
Treat this as a moderate workstation and privileged-system hygiene issue. It is lower priority than remotely exploitable flaws, but should still be addressed where RoboHelp runs on shared or sensitive systems.
Technical view
CVE-2021-21070 is a CWE-427 uncontrolled search path element vulnerability in Adobe RoboHelp. The CVSS 3.1 vector is AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H, scored 6.5. The source states that an attacker with admin file-system write permissions could escalate privileges. Fixed versions or specific mitigations are not included in the supplied data.
Likely exposure
Exposure is likely limited to endpoints or documentation-authoring systems with Adobe RoboHelp 2020.0.3 or earlier installed. Systems without RoboHelp are not indicated as affected by the provided sources.
Exploitation context
The supplied bundle does not show CISA KEV listing or active exploitation. Exploitation is local, requires high privileges, and requires user interaction, reducing broad enterprise-scale urgency.
Researcher notes
Evidence is sparse in the supplied bundle. The key confirmed facts are affected product/version range, CWE-427 classification, local attack vector, high privilege requirement, user interaction, and no KEV listing. Do not assume exploit availability or a specific fixed version from this data alone.
Mitigation direction
- Inventory Adobe RoboHelp installations and identify versions 2020.0.3 or earlier.
- Review Adobe APSB21-20 for official update or mitigation guidance.
- Remove unused RoboHelp installations from managed endpoints.
- Limit administrative file-system write access to trusted administrators.
- Prioritize remediation on shared, privileged, or production documentation systems.
Validation and detection
- Confirm installed RoboHelp versions on relevant endpoints.
- Check whether Adobe APSB21-20 guidance has been applied.
- Review endpoint management records for unauthorized RoboHelp installations.
- Verify local administrator groups are restricted on affected systems.
- Monitor vulnerability tracking for any later exploitation evidence.
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-427: 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 lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-21070 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 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/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:R/S:U/C:H/I:H/A:H0.65.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://helpx.adobe.com/security/products/robohelp/apsb21-20.htmlCVE 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.
Uncontrolled Search Path Element
Uncontrolled Search Path Element represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.