Security readout for executives and security teams
Plain-English summary
Adobe InCopy 16.4 and earlier can be compromised if a user opens a malicious crafted file. Successful exploitation could let attacker-controlled code run with that user’s permissions, creating risk to documents, credentials, and the workstation.
Executive priority
Treat this as a high-priority workstation exposure, not an internet-facing emergency. Patch affected InCopy installations promptly, focusing first on creative and publishing users who open files from external sources.
Technical view
The flaw is an out-of-bounds read in Adobe InCopy TIF file parsing, classified as CWE-125. CVSS 3.0 is 7.8 with local attack vector, low complexity, no privileges required, and required user interaction. Impact is rated high for confidentiality, integrity, and availability.
Likely exposure
Exposure is limited to environments with Adobe InCopy 16.4 or earlier installed, especially teams handling external publishing, design, or document files. Systems without InCopy are not indicated as affected by the provided sources.
Exploitation context
The provided bundle does not show CISA KEV listing or other evidence of active exploitation. Exploitation requires user interaction: a victim must open a malicious file. That still matters where users routinely receive files from outside parties.
Researcher notes
Evidence supports a crafted-file parsing memory safety issue with potential code execution in the current user context. The bundle identifies InCopy 16.4 and earlier but does not provide detailed fixed-version data, exploit samples, or active exploitation evidence.
Mitigation direction
- Review Adobe APSB22-04 and apply the vendor’s recommended security update.
- Inventory endpoints for Adobe InCopy 16.4 and earlier.
- Prioritize remediation for users handling external files or publishing workflows.
- Limit opening unsolicited TIF or document files until affected systems are remediated.
- Use endpoint controls to reduce impact from user-context code execution.
Validation and detection
- Confirm whether Adobe InCopy is installed on managed endpoints.
- Compare installed InCopy versions against the affected 16.4-and-earlier range.
- Verify remediation status against Adobe APSB22-04 guidance.
- Review security telemetry for suspicious activity following unexpected file opens.
- Check whether high-risk users receive external publishing or image 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-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 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-2021-45055 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 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/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:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.8HighVector: CVSS:3.0/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/incopy/apsb22-04.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 Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.