Security readout for executives and security teams
Plain-English summary
CVE-2021-45345 is a remotely reachable buffer overflow in En3rgy WebcamServer v0.5.2 that can crash the service. The business impact is availability: exposed webcam services may be knocked offline without authentication or user interaction.
Executive priority
Prioritize exposed deployments because the flaw is unauthenticated and network reachable, but scope should be narrow if this legacy webcam server is uncommon internally.
Technical view
The CVE describes CWE-120 in WebcamServer.exe for En3rgy WebcamServer v0.5.2. CVSS 3.1 is 7.5 high: network attack vector, low complexity, no privileges, no user interaction, unchanged scope, and high availability impact only.
Likely exposure
Exposure appears limited to systems running En3rgy WebcamServer v0.5.2, especially if reachable from untrusted networks. The CVE metadata does not provide CPEs or normalized affected vendor/product fields.
Exploitation context
The bundle includes public references, but it does not cite active exploitation, and KEV is false. Treat public technical interest as a validation priority, not proof of current exploitation.
Researcher notes
Evidence is sparse: affected metadata is listed as n/a, while the description identifies En3rgy WebcamServer v0.5.2. No source in the bundle names a patch. Keep assessment scoped to denial of service unless additional vendor or researcher evidence supports more impact.
Mitigation direction
- Identify and retire any En3rgy WebcamServer v0.5.2 deployments where feasible.
- Remove internet exposure; restrict access with firewall rules or VPN.
- Check vendor/project guidance for a fixed or maintained release.
- Replace the software if no supported fixed version is available.
- Monitor affected hosts for unexpected WebcamServer.exe crashes or restarts.
Validation and detection
- Search asset inventory for En3rgy WebcamServer and WebcamServer.exe.
- Confirm installed version equals or differs from v0.5.2.
- Check whether the service is reachable from internet or untrusted networks.
- Review endpoint and service logs for crashes or abnormal restarts.
- Document compensating controls if no vendor fix is confirmed.
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-120: 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-2021-45345 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
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://gist.github.com/0xHop/0d065694d56ac3943d8e8c239d80c63fCVE reference
- https://sourceforge.net/projects/webcamserv/CVE reference
- https://gist.github.com/0xHop/337e65ec684b8866e86f4b25b8f1dbc7CVE 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.
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.