Security readout for executives and security teams
Plain-English summary
Adobe Bridge 11.1.1 and earlier can mishandle a malicious file and lead to code execution. An attacker would need a user to open the crafted file in Bridge. Successful exploitation runs with that user's permissions, so risk is highest on workstations handling untrusted creative assets.
Executive priority
Treat as a high-priority endpoint patching issue, not an internet-facing emergency. Business urgency depends on how often staff open external files in Adobe Bridge and whether affected systems have sensitive access.
Technical view
The CVE describes a stack overflow/out-of-bounds write (CWE-787) in Adobe Bridge caused by insecure handling of crafted files. CVSS 3.1 is 7.8 high, with local attack vector, low complexity, no privileges required, and required user interaction.
Likely exposure
Exposure is limited to systems with Adobe Bridge 11.1.1 or earlier installed, especially user endpoints processing files from email, downloads, clients, shared drives, or media workflows.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. Exploitation requires user interaction: the victim must open a crafted file in Adobe Bridge.
Researcher notes
Key constraints are local attack vector and required user interaction. The bundle names arbitrary code execution in the current user context but provides no exploit evidence, no weaponized details, and no complete affected CPE data.
Mitigation direction
- Identify endpoints running Adobe Bridge 11.1.1 or earlier.
- Review Adobe APSB21-94 for the vendor-approved update or mitigation path.
- Prioritize updates for users handling untrusted or external media files.
- Restrict opening unsolicited project or media files in Bridge until remediated.
- Use least-privilege user accounts to limit post-exploitation impact.
Validation and detection
- Inventory installed Adobe Bridge versions across managed endpoints.
- Confirm whether installed versions are 11.1.1 or earlier.
- Verify remediation status against Adobe APSB21-94 guidance.
- Check endpoint controls for suspicious Bridge crashes or child processes.
- Confirm users handling external files are included in remediation scope.
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-2021-42727 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/apsb21-94.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.