Security readout for executives and security teams
Plain-English summary
This CVE lets an unauthenticated network attacker crash and reboot a vulnerable Reolink RLC-410W camera by sending a crafted HTTP request. The known impact is availability loss, not data theft or code execution. Business urgency depends on whether these cameras are exposed to untrusted networks or support safety-critical monitoring.
Executive priority
Treat as high priority for internet-exposed or operationally important cameras. The known risk is outage and surveillance disruption, not compromise of data or systems. Prioritize segmentation and firmware review before lower-risk internal devices.
Technical view
The issue is improper input validation in the cgiserver.cgi JSON command parser. For Reolink RLC-410W v3.0.0.136_20121102, a malformed UpgradePrepare parameter can trigger a reboot over HTTP. CVSS is 8.6 because attack complexity and privileges are low and availability impact is high.
Likely exposure
Exposure is likely limited to Reolink RLC-410W cameras running v3.0.0.136_20121102, especially where the camera web interface is reachable from the internet, guest networks, vendor networks, or other untrusted segments.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. Public reporting describes a crafted HTTP request that can trigger reboot, so exploitation is plausible where vulnerable camera HTTP services are reachable, but evidence of real-world abuse is not provided.
Researcher notes
Affected CPE data is not populated in the bundle, but the CVE description names Reolink RLC-410W v3.0.0.136_20121102. No patch version is identified in the provided sources, so remediation should be confirmed against vendor or Talos guidance.
Mitigation direction
- Inventory Reolink RLC-410W cameras and confirm firmware versions.
- Check Reolink and Talos guidance for fixed firmware or vendor workarounds.
- Remove camera HTTP access from the public internet and untrusted networks.
- Restrict management access with firewall rules, VPN, or isolated admin networks.
- Monitor vulnerable devices for unexpected reboots or availability drops.
Validation and detection
- Confirm whether any asset runs Reolink RLC-410W v3.0.0.136_20121102.
- Verify camera management interfaces are not internet-exposed.
- Review firewall rules for access to camera HTTP services.
- Check device uptime and logs for unexplained reboots.
- Use only authorized lab testing; avoid malformed-request testing in production.
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-2021-44410 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.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.