Security readout for executives and security teams
Plain-English summary
OpenEXR versions before 3.0.1 contain an integer overflow that can become a heap-buffer overflow. The cited impact is application crash, so the primary business risk is denial of service in software that opens or processes OpenEXR files.
Executive priority
Treat this as a targeted remediation item for file-processing systems, not a confirmed emergency. Prioritize externally exposed or customer-facing content pipelines because crashes can disrupt service availability.
Technical view
The CVE describes an integer overflow leading to heap-buffer overflow in OpenEXR before 3.0.1. The public description states an attacker could crash an application compiled with OpenEXR. No CVSS vector, detailed trigger conditions, or broader code execution claim is provided in the supplied sources.
Likely exposure
Exposure is most likely in image, rendering, media, VFX, content-processing, or asset-ingestion applications that use OpenEXR versions before 3.0.1, including embedded or packaged copies.
Exploitation context
The supplied sources do not show CISA KEV listing or active exploitation evidence. They support a denial-of-service scenario through crashing affected applications, but do not provide public proof of weaponized exploitation.
Researcher notes
Evidence is sparse: no CVSS, no detailed affected CPEs, and only crash impact is stated. The affected range is described as before 3.0.1; validate distribution backports carefully because package versions may not match upstream numbering.
Mitigation direction
- Inventory applications and packages that include or link OpenEXR.
- Update OpenEXR versions before 3.0.1 where vendor fixes are available.
- Apply vendor package updates for embedded OpenEXR copies.
- Restrict untrusted OpenEXR file processing until affected systems are remediated.
- Monitor vendor advisories for distribution-specific fixed package versions.
Validation and detection
- Check runtime and package inventories for OpenEXR versions before 3.0.1.
- Review SBOMs for statically linked or bundled OpenEXR components.
- Confirm vendor advisories map the installed package to a fixed release.
- Prioritize systems that process externally supplied OpenEXR 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
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CWE-400: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-26945 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://bugzilla.redhat.com/show_bug.cgi?id=1947591CVE 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.
Uncontrolled Resource Consumption
Uncontrolled Resource Consumption represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.