Security readout for executives and security teams
Plain-English summary
CVE-2021-44360 is a denial-of-service flaw in a Reolink camera web CGI parser. A specially crafted HTTP request can reboot the affected camera, disrupting availability. The source bundle identifies Reolink RLC-410W firmware v3.0.0.136_20121102; broader affected versions and vendor fixes are not confirmed here.
Executive priority
High for organizations relying on affected cameras for physical security or operations. The impact is service disruption rather than data theft, but unauthenticated network reachability makes exposed devices operationally fragile. Prioritize inventory, exposure reduction, and vendor fix verification.
Technical view
The issue is improper input validation in cgiserver.cgi JSON command parsing. Talos/CVE describe SetNorm handling where the parameter is not an object, allowing an unauthenticated network HTTP request to trigger a reboot. CVSS 3.0 is 8.6: AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
Likely exposure
Exposure is most likely where Reolink RLC-410W v3.0.0.136_20121102 devices have reachable HTTP management interfaces. Internet-exposed cameras, flat networks, or untrusted access to device management paths increase business risk. The bundle does not confirm additional models, versions, or CPEs.
Exploitation context
The CVE states an attacker can send an HTTP request to trigger the reboot. The bundle does not cite public exploitation in the wild, and CISA KEV status is false. Treat this as remotely triggerable availability risk, not confirmed active exploitation.
Researcher notes
Evidence is strongest for Reolink RLC-410W v3.0.0.136_20121102 and the cgiserver.cgi JSON SetNorm parser path. The source bundle lists CWE-20 and CVSS 8.6. It does not establish broader product scope, patch availability, or active exploitation.
Mitigation direction
- Inventory Reolink RLC-410W devices and record firmware versions.
- Remove public internet exposure to camera HTTP management interfaces.
- Restrict management access to trusted admin networks or VPN paths.
- Check Reolink and Talos guidance for confirmed firmware fixes or workarounds.
- Prioritize replacement or isolation if no supported update exists.
Validation and detection
- Confirm whether any device runs firmware v3.0.0.136_20121102.
- Review firewall and NAT rules for exposed camera HTTP services.
- Check monitoring for unexplained camera reboots or availability drops.
- Review device logs for suspicious HTTP management access, if available.
- Track CVE, Talos, and vendor pages for updated scope or fixes.
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-2021-44360 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.