Security readout for executives and security teams
Plain-English summary
CVE-2021-35989 is a high-impact Adobe Bridge flaw where opening a malicious file can let an attacker run code as the logged-in user. It is not a remote, no-click issue: the victim must open the crafted file. Business risk is highest on workstations handling externally supplied media or PDF-like content.
Executive priority
Treat as a priority workstation patching issue, not a broad internet-facing emergency. Focus first on teams that process outside files, because compromise would run with the user’s access and could expose sensitive business data.
Technical view
Adobe Bridge 11.0.2 and earlier are affected by a CWE-787 out-of-bounds write during specially crafted file parsing. CVSS 3.1 is 7.8 with local attack vector, low complexity, no privileges required, and required user interaction. Successful exploitation can affect confidentiality, integrity, and availability as the current user.
Likely exposure
Exposure is limited to systems running Adobe Bridge 11.0.2 or earlier, especially users who open files from clients, suppliers, email, cloud shares, or public sources.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Exploitation requires user interaction: a victim must open a malicious file in an affected Adobe Bridge version.
Researcher notes
Evidence supports arbitrary code execution through a crafted file and required user interaction. The bundle does not provide exploit-in-the-wild evidence, a fixed version number, or detailed mitigation text beyond Adobe’s advisory reference, so remediation should be confirmed directly against APSB21-53.
Mitigation direction
- Inventory Adobe Bridge installations and identify versions 11.0.2 or earlier.
- Apply Adobe’s APSB21-53 guidance for supported security updates.
- Restrict opening untrusted files in Adobe Bridge until remediation is verified.
- Prioritize remediation for creative, marketing, and intake workstations handling external files.
Validation and detection
- Confirm installed Adobe Bridge versions against the affected range.
- Verify remediation status using Adobe APSB21-53 guidance.
- Review endpoint software inventory for unmanaged Adobe Bridge installs.
- Check whether high-risk users routinely receive and open external files.
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-787: 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 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-2021-35989 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
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/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:N/UI:R/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://helpx.adobe.com/security/products/bridge/apsb21-53.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.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.