Security readout for executives and security teams
Plain-English summary
This is a file-opening risk in Adobe Media Encoder 15.2 and earlier. A user must open a malicious TS file for exposure to occur. The supplied CVSS data rates impact as low confidentiality loss, but the description also mentions possible code execution, so the record should be verified against Adobe guidance.
Executive priority
Treat as routine endpoint patching unless Adobe guidance or internal telemetry indicates exploitation. Prioritize creative, marketing, and media-production users who process external files.
Technical view
CVE-2021-28589 is a CWE-125 out-of-bounds read during TS file parsing in Adobe Media Encoder 15.2 and earlier. The vector is local, low complexity, no privileges required, and user interaction required. CVSS 3.1 is 3.3 with low confidentiality impact only.
Likely exposure
Exposure is most likely on endpoints where Adobe Media Encoder 15.2 or earlier is installed and users can open untrusted media files. Server-side exposure is not indicated by the supplied sources.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. Exploitation requires a victim to open a specially crafted file, reducing wormable or remote-at-scale risk.
Researcher notes
There is a source tension: the title and CVSS describe out-of-bounds read information disclosure, while the description states arbitrary code execution. Do not assume exploitability beyond the cited vendor and CVE records without confirming Adobe’s advisory details.
Mitigation direction
- Update Adobe Media Encoder according to Adobe APSB21-43 guidance.
- Inventory endpoints for Adobe Media Encoder 15.2 and earlier.
- Restrict opening media files from untrusted sources until updated.
- Use endpoint controls to flag suspicious downloaded media files.
Validation and detection
- Confirm installed Adobe Media Encoder versions across managed endpoints.
- Check whether systems are at or below version 15.2.
- Review Adobe APSB21-43 for the vendor-fixed version and deployment guidance.
- Verify users handling external media files are prioritized.
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-2021-28589 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 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/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:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N1.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
3.3LowVector: CVSS:3.1/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://helpx.adobe.com/security/products/media-encoder/apsb21-43.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.