Security readout for executives and security teams
Plain-English summary
This flaw can let a remote unauthenticated attacker crash and reboot a vulnerable Reolink camera, disrupting video availability. The source bundle names Reolink RLC-410W firmware v3.0.0.136_20121102. It is an availability issue, not a stated data theft or takeover issue.
Executive priority
Prioritize if vulnerable cameras support physical security, safety, compliance, or critical operations. The business risk is surveillance downtime from remote reboot, especially for internet-exposed devices.
Technical view
CVE-2021-44383 is improper input validation in Reolink cgiserver.cgi JSON command parsing. A malformed SetAutoUpgrade parameter can trigger a reboot. CVSS 8.6 reflects network reachability, low complexity, no authentication, and high availability impact, with no stated confidentiality or integrity impact.
Likely exposure
Exposure is likely limited to organizations running the named Reolink RLC-410W firmware, especially where camera web interfaces are reachable from untrusted networks or the internet. The bundle does not provide a complete affected-version range.
Exploitation context
The bundle says an attacker can send an HTTP request to trigger a reboot. It does not cite active exploitation, and CISA KEV status is false. No exploit maturity or real-world incident evidence is provided.
Researcher notes
The CVE record is specific about the vulnerable parser behavior and named firmware, but incomplete on affected ranges and remediation. Treat validation as exposure and version confirmation, not exploit reproduction, unless performed in an authorized lab.
Mitigation direction
- Identify affected Reolink RLC-410W devices and firmware versions.
- Remove camera management interfaces from internet exposure.
- Restrict access to trusted admin networks or VPN paths.
- Check Reolink and Talos guidance for fixed firmware or vendor workarounds.
- Monitor affected cameras for unexplained reboots and availability loss.
Validation and detection
- Confirm model and firmware through asset inventory or authenticated administration records.
- Verify cgiserver.cgi is not reachable from untrusted network segments.
- Review camera uptime, monitoring, and network logs for reboot patterns.
- Track vendor advisories for patch availability and affected-version clarification.
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 lookupCVE-2021-44383 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
- 8.6 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/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:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H3.94Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
8.6HighVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1421CVE 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.