Security readout for executives and security teams
Plain-English summary
CVE-2022-36587 is a critical buffer overflow in the Tenda G3 router firmware’s httpd component. The published CVSS score is 9.8, meaning a network attacker may not need credentials or user interaction. Business urgency is highest where these devices manage network access or expose administration services.
Executive priority
Treat this as urgent for any deployed Tenda G3 device on the named firmware. Prioritize internet-facing or network-edge devices first, because the CVSS vector indicates unauthenticated remote risk and full confidentiality, integrity, and availability impact.
Technical view
The CVE describes a CWE-120 buffer overflow caused by sprintf in the httpd binary for Tenda G3 firmware US_G3V3.0br_V15.11.0.6(7663)_EN_TDE. The CVSS vector is AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, indicating remote, low-complexity, unauthenticated impact to confidentiality, integrity, and availability.
Likely exposure
Exposure is most likely in environments running the named Tenda G3 firmware build, especially where the HTTP management interface is reachable from untrusted networks. The CVE data does not provide normalized CPEs, so inventory checks must verify model and firmware directly.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. A public GitHub bug report is referenced, which may increase researcher awareness, but the provided evidence is insufficient to claim real-world exploitation.
Researcher notes
The record is specific about firmware build and vulnerable component but weak on normalized affected-product metadata. Avoid broad claims beyond Tenda G3 US_G3V3.0br_V15.11.0.6(7663)_EN_TDE unless vendor documentation confirms additional versions.
Mitigation direction
- Check Tenda’s download or advisory page for fixed firmware guidance.
- Upgrade affected Tenda G3 devices if a vendor-fixed firmware is available.
- Restrict HTTP administration access to trusted management networks only.
- Remove internet exposure for affected management interfaces.
- Replace devices if no supported vendor fix exists.
Validation and detection
- Inventory Tenda G3 devices and record exact firmware versions.
- Confirm whether US_G3V3.0br_V15.11.0.6(7663)_EN_TDE is present.
- Review external attack surface for exposed HTTP management interfaces.
- Check vulnerability scanners for CVE-2022-36587 coverage and asset matches.
- Document vendor guidance and remediation status per device.
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-120: 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-2022-36587 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
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.tendacn.com/download/detail-3401.htmlCVE reference · x_refsource_MISC
- https://github.com/Davidteeri/Bug-Report/blob/main/tenda-G3-%200x53208.mdCVE 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.
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.