Security readout for executives and security teams
Plain-English summary
CVE-2021-42733 is a crash risk in Adobe Bridge 11.1.1 and earlier. A user must open a maliciously crafted file. Successful exploitation can deny use of the Bridge application for that user, but the provided sources do not indicate data theft, code execution, or system takeover.
Executive priority
Treat this as a moderate endpoint availability issue. It is unlikely to be an emergency unless Adobe Bridge is operationally important or users routinely open untrusted files, but affected installations should be updated through normal vulnerability management.
Technical view
The issue is a CWE-476 NULL pointer dereference in Adobe Bridge file parsing. CVSS 3.1 is 5.5: local attack vector, low complexity, no privileges required, user interaction required, unchanged scope, and high availability impact only.
Likely exposure
Exposure is mainly endpoint-based: workstations running Adobe Bridge 11.1.1 or earlier, especially where users handle externally supplied creative assets or archives. The sources do not identify a network service exposure.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Exploitation requires a victim to open a malicious file, which can crash Adobe Bridge in the current user's context.
Researcher notes
The evidence supports denial-of-service only. Do not assume code execution, privilege escalation, or confidentiality impact from the provided sources. Patch details are not included in the bundle, so remediation should be verified directly against Adobe APSB21-94.
Mitigation direction
- Identify Adobe Bridge installations at version 11.1.1 or earlier.
- Review Adobe APSB21-94 for the vendor-supported update or remediation path.
- Prioritize users who receive untrusted creative files from external parties.
- Limit opening of untrusted files until vendor guidance is applied.
- Keep endpoint protection and file-handling controls current.
Validation and detection
- Inventory installed Adobe Bridge versions across managed endpoints.
- Confirm whether any installations are version 11.1.1 or earlier.
- Verify remediation against Adobe APSB21-94 guidance.
- Check security tooling for alerts involving suspicious files opened in Bridge.
- Document remaining unsupported or unmanaged installations.
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
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CWE-476: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-42733 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/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:N/I:N/A:H1.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/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.