Security readout for executives and security teams
Plain-English summary
CVE-2021-29112 is a low-severity Esri ArcReader issue where opening a malicious PMF file can cause limited information disclosure in the current user context. It requires user interaction and local file handling, so business urgency is usually low unless ArcReader users routinely receive external PMF files.
Executive priority
Treat this as a targeted user-workstation risk, not an enterprise emergency. Prioritize routine patching, file-handling controls, and user awareness for GIS teams, especially where PMF files arrive from outside the organization.
Technical view
The vulnerability is an out-of-bounds read in ArcReader PMF file parsing, mapped to CWE-125. The CVSS 3.0 vector is AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N, indicating local attack vector, no privileges, required user interaction, and confidentiality-only impact.
Likely exposure
Exposure is limited to environments using Esri ArcReader 10.8.1 or earlier, or the affected ArcReader versions identified by Esri guidance. Higher-risk groups are GIS users who open PMF files from email, shared drives, contractors, or other untrusted sources.
Exploitation context
The provided sources do not indicate active exploitation, and the CVE is not listed as KEV in the supplied bundle. Exploitation requires convincing a user to open a specially crafted file; no remote unauthenticated network attack path is described.
Researcher notes
The key uncertainty is version specificity: the description cites ArcReader 10.8.1 and earlier, while the supplied affected entry says all versions. The bundle names a vendor security update but does not provide detailed remediation text, so validation should defer to Esri’s advisory.
Mitigation direction
- Review Esri’s ArcReader security update guidance for the applicable supported fix.
- Update or retire affected ArcReader installations according to vendor guidance.
- Restrict PMF file opening to trusted sources only.
- Block or quarantine unexpected PMF attachments where practical.
- Educate GIS users not to open unsolicited PMF files.
Validation and detection
- Inventory endpoints with Esri ArcReader installed.
- Confirm installed ArcReader versions against Esri’s affected-version guidance.
- Review mail and file-sharing controls for PMF handling.
- Check whether GIS teams receive PMF files from external parties.
- Document compensating controls where updates are not immediately possible.
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-125: 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-2021-29112 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
- Low
- CVSS
- 3.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/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:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N1.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
3.3LowVector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.esri.com/arcgis-blog/products/arcgis-desktop/administration/arcreader-general-data-frame-security-update/CVE reference · x_refsource_CONFIRM
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.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.