Security readout for executives and security teams
Plain-English summary
This vulnerability can let an unauthenticated network attacker send a malformed HTTP request to a specific Reolink camera model and force a reboot. The business impact is availability: cameras may drop offline, causing monitoring gaps. The provided sources do not identify data theft or device takeover.
Executive priority
Prioritize remediation where affected cameras support physical security, safety monitoring, or customer-facing operations. The issue is availability-focused, but repeated reboots can create operational blind spots. Internet-exposed or broadly reachable devices should be handled first.
Technical view
CVE-2021-44419 is an input-validation flaw in the cgiserver.cgi JSON command parser for Reolink RLC-410W v3.0.0.136_20121102. A specially crafted HTTP request where the GetMdAlarm parameter is not an object can trigger a reboot. CVSS is 8.6 with network, low-complexity, no-authentication attack characteristics.
Likely exposure
Exposure is most likely where affected Reolink RLC-410W cameras expose the HTTP cgiserver.cgi interface to untrusted networks. The source bundle’s structured affected-product metadata is incomplete, so inventory should be confirmed against device model and firmware version.
Exploitation context
The CVE and Talos reference describe remote denial of service by HTTP request. CISA KEV status is false in the provided bundle, and no cited source claims active exploitation. Treat exploit status as unconfirmed, not actively exploited.
Researcher notes
Evidence supports a specific parser failure condition and reboot outcome, but the bundle does not provide patch details, exploit prevalence, or complete CPE metadata. Avoid broad product claims beyond Reolink RLC-410W v3.0.0.136_20121102 unless confirmed from vendor data.
Mitigation direction
- Identify Reolink RLC-410W devices and confirm firmware version.
- Check Reolink and Talos guidance for patched firmware or vendor mitigation.
- Block untrusted access to camera HTTP management interfaces.
- Place affected cameras on restricted network segments.
- Monitor for unexpected camera reboots or availability drops.
Validation and detection
- Inventory camera model, firmware, and exposed management interfaces.
- Confirm whether cgiserver.cgi is reachable from untrusted networks.
- Review logs or monitoring for unexplained reboot patterns.
- Validate vendor firmware status before declaring remediation complete.
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-2021-44419 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.
Improper Input Validation
Improper Input Validation represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.