Security readout for executives and security teams
Plain-English summary
CVE-2021-27417 affects eCosCentric eCosPro RTOS memory allocation. In embedded or industrial devices using affected eCosPro versions, a highly privileged local actor could cause memory corruption and potentially disrupt device availability. The main business concern is identifying embedded dependencies and obtaining vendor-supported remediation guidance.
Executive priority
Treat this as a moderate-priority embedded software risk. It is not described as remotely exploitable or actively exploited, but affected operational devices could face availability impact. Focus on supplier verification, asset inventory, and vendor-supported fixes.
Technical view
The source describes CWE-190 integer wraparound in the eCosPro RTOS calloc implementation, reported for versions 2.0.1 through 4.5.3. An unchecked allocation size can lead to arbitrary memory allocation and heap-based buffer overflow. CVSS 3.1 is 4.6 with local attack vector, high complexity, high privileges, and required user interaction.
Likely exposure
Exposure is most likely in products, firmware, or operational technology systems built on eCosCentric eCosPro RTOS versions 2.0.1 through 4.5.3. The provided affected-product metadata is limited, so asset owners should verify embedded RTOS usage with vendors and SBOMs.
Exploitation context
The bundle does not show CISA KEV listing or public active exploitation evidence. The CVSS vector indicates exploitation requires local access, high privileges, high complexity, and user interaction, which limits broad remote risk but does not remove availability risk in embedded systems.
Researcher notes
Evidence is sufficient for the vulnerability class and CVSS constraints but incomplete for exact downstream products and remediation. The source bundle names eCosPro versions 2.0.1 through 4.5.3, while the structured affected entry lists only 2.0.1, so validate version ranges against vendor material.
Mitigation direction
- Identify devices or firmware using eCosCentric eCosPro RTOS.
- Check vendor advisories for patched or supported eCosPro versions.
- Request supplier confirmation for embedded eCosPro dependency status.
- Prioritize remediation for safety, availability, or operationally critical devices.
- Apply compensating controls where vendor fixes are unavailable.
Validation and detection
- Review SBOMs and firmware manifests for eCosPro RTOS.
- Compare installed eCosPro versions against 2.0.1 through 4.5.3.
- Confirm vendor patch status through eCosCentric or device suppliers.
- Document whether exposed systems require local privileged access.
- Track exceptions for unsupported or unverifiable embedded devices.
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-190: 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 lookupCVE-2021-27417 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
- Medium
- CVSS
- 4.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:N/I:L/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:H/PR:H/UI:R/S:U/C:N/I:L/A:H0.34.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.6MediumVector: CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04CVE reference · x_refsource_CONFIRM
- https://bugzilla.ecoscentric.com/show_bug.cgi?id=1002437CVE reference · x_refsource_CONFIRM
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.