Security readout for executives and security teams
Plain-English summary
CVE-2021-35370 is a critical arbitrary code execution issue reported in Peacexie Imcat v5.4. If an organization runs this software, especially where reachable over a network, compromise could affect confidentiality, integrity, and availability. The public metadata is sparse, so exposure should be verified before assuming impact.
Executive priority
Treat as urgent only where Imcat v5.4 is present or suspected. The impact rating is critical, but business priority depends on confirming deployment and exposure. Unknown use should trigger rapid inventory, not panic.
Technical view
The CVE describes arbitrary code execution caused by an incomplete filtering function, mapped to CWE-20 improper input validation. CVSS 3.1 is 9.8 with network attack vector, low complexity, no privileges, and no user interaction. Structured affected product metadata is listed as n/a, but the description names Peacexie Imcat v5.4.
Likely exposure
Exposure is likely limited to deployments of Peacexie Imcat v5.4. The CVE bundle does not identify CPEs, hosting patterns, default configurations, or affected components, so teams need asset-level confirmation rather than broad product assumptions.
Exploitation context
The source bundle does not show CISA KEV inclusion, and no cited source states active exploitation. The CVSS vector indicates a remotely reachable, unauthenticated attack path, but the provided evidence does not establish real-world exploitation or public weaponization status.
Researcher notes
Public details are limited: arbitrary code execution via incomplete filtering, CWE-20, CVSS 9.8. The affected metadata is not structured, and the bundle provides no named patch, workaround, endpoint, proof of exploitation, or KEV signal.
Mitigation direction
- Identify any deployed Peacexie Imcat v5.4 instances.
- Check the upstream issue and vendor guidance for fixed versions or mitigations.
- Remove or isolate Imcat deployments that are not business-critical.
- Restrict network access to confirmed required users and systems.
- Monitor vendor and CVE records for updated remediation details.
Validation and detection
- Search asset inventory for Peacexie Imcat v5.4 deployments.
- Confirm whether any identified instance is network reachable.
- Compare findings against the CVE record and GitHub issue reference.
- Review application logs for unexplained execution or integrity indicators.
- Document uncertainty where version or component evidence is incomplete.
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-20: 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-2021-35370 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
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/peacexie/imcat/issues/8CVE reference
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.