Security readout for executives and security teams
Plain-English summary
This CVE can let an unauthenticated remote attacker reboot an affected Reolink camera with a specially crafted HTTP request. The business risk is loss of camera availability, not confirmed data theft or tampering. Evidence identifies Reolink RLC-410W firmware v3.0.0.136_20121102, but structured affected-product data is incomplete.
Executive priority
Treat this as a high-priority availability risk for exposed surveillance cameras. Prioritize internet-facing or operationally critical devices first, because exploitation requires no credentials and can disrupt camera service. There is no cited evidence of data compromise or active exploitation in the provided sources.
Technical view
The issue is improper input validation in the cgiserver.cgi JSON command parser. Sources state that a malformed Set3G parameter can trigger a denial of service and device reboot. CVSS 8.6 reflects network reachability, low complexity, no privileges, no user interaction, and high availability impact.
Likely exposure
Exposure is most likely where Reolink RLC-410W cameras running v3.0.0.136_20121102 have HTTP management paths reachable from the internet or untrusted networks. The CVE record’s structured affected fields are listed as n/a, so asset validation must rely on device model and firmware evidence.
Exploitation context
The source bundle does not cite active exploitation, and the CVE is not listed as KEV. Public sources describe an unauthenticated network-triggered denial of service via crafted HTTP request, but do not provide evidence of exploitation in the wild.
Researcher notes
Use the Talos report and CVE record as the grounding sources. Avoid assuming broader Reolink impact beyond the named RLC-410W firmware unless vendor evidence confirms it. The main evidence gap is incomplete structured affected-product and remediation data in the bundle.
Mitigation direction
- Check Reolink and Talos guidance for confirmed firmware fixes or advisories.
- Identify RLC-410W devices and verify firmware versions.
- Restrict camera HTTP management access to trusted networks only.
- Remove direct internet exposure for affected camera interfaces.
- Monitor affected devices for unexpected reboots or availability loss.
Validation and detection
- Inventory Reolink camera models and recorded firmware versions.
- Confirm whether any RLC-410W runs v3.0.0.136_20121102.
- Review firewall rules for exposed camera HTTP services.
- Check logs or monitoring for unexplained camera reboots.
- Document any vendor firmware or mitigation status found.
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
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ATT&CK lookup starting points
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Open ATT&CK lookupCVE-2021-44361 mapping review
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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.