Analyst readout for executives and security teams
Plain-English summary
This CVE affects Totolink A8000RU firmware 7.1cu.643_b20200521. A remote attacker could abuse the router web management interface to run operating-system commands on the device. The source bundle reports public exploit material, but does not show confirmed active exploitation or an official fix.
Executive priority
Treat this as urgent for any exposed Totolink A8000RU. Public exploit material and unauthenticated remote command execution create high business risk, but priority depends on whether the affected firmware and reachable management interface exist in your environment.
Technical view
The issue is OS command injection in /cgi-bin/cstecgi.cgi, function setMacFilterRules, through the enable argument. The CVSS v2 vector is AV:N/AC:L/Au:N/C:C/I:C/A:C, score 10.0. VulDB maps it to CWE-77 and CWE-78 and lists exploit maturity as proof-of-concept.
Likely exposure
Exposure is limited to Totolink A8000RU devices running firmware 7.1cu.643_b20200521, especially where the web management interface is reachable from untrusted networks. The bundle does not identify other affected products or versions.
Exploitation context
The sources state remote attack is possible and that exploit material is publicly available. KEV is false, and no cited source in the bundle confirms active exploitation in the wild.
Researcher notes
Evidence comes from CVE/VulDB metadata and linked public references. The bundle names one firmware build, one CGI endpoint, and one vulnerable argument. It does not provide a vendor advisory, patch version, exploitation-in-the-wild confirmation, or broader version range.
Mitigation direction
- Remove public access to the router web management interface.
- Limit management access to trusted administrative networks only.
- Check Totolink guidance for firmware updates or official mitigations.
- Retire or replace affected devices if no supported fix exists.
- Monitor routers for unexpected configuration or outbound traffic changes.
Validation and detection
- Inventory Totolink A8000RU devices in the environment.
- Confirm whether firmware version 7.1cu.643_b20200521 is installed.
- Check whether /cgi-bin/cstecgi.cgi is reachable from untrusted networks.
- Review perimeter exposure for internet-accessible management interfaces.
- Correlate router logs with unusual configuration changes.
Public sources used
Based on public source material and reviewed before publication.
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-77: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. 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 lookupCWE-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-9433 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
- 10 (2.0)
- Known Exploited
- No
- Published
Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
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
4 official scoresWe 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.
AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR 10 10 VulDB CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R 3.9 5.9 VulDB CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R 3.9 5.9 VulDB CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P — — VulDB Vulnerability scoring details
Base CVSS 4.0 score
9.3 CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
Base CVSS 3.1 score
9.8 CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
Base CVSS 3.0 score
9.8 CriticalVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
Base CVSS 2.0 score
10 CriticalVector: AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- Source timeline VulDB
Advisory disclosed
- Source timeline VulDB
VulDB entry created
- CVE reserved CVE Program
The CVE ID was reserved by the assigning CNA.
- Source timeline VulDB
VulDB entry last update
- CVE published CVE Program
The CVE record was published.
- CVE updated CVE Program
The CVE record metadata indicates this as the latest update time.
Source materials
- CVE List V5 source CVE List V5
- VDB-365414 | Totolink A8000RU Web Management cstecgi.cgi setMacFilterRules os command injection CVE reference, VulDB · vdb-entry, technical-description
- VDB-365414 | CTI Indicators (IOB, IOC, TTP, IOA) CVE reference, VulDB · signature, permissions-required
- Submit #813906 | Totolink A8000RU 7.1cu.643_b20200521 Command Injection CVE reference, VulDB · third-party-advisory
- https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_354/README.md CVE reference, VulDB · exploit
- https://www.totolink.net/ CVE reference, VulDB · product
Products and packages named in the record
CWE details
CWE links open conservative ATT&CK lookup hints, not official CWE-to-ATT&CK mappings. Source links are consolidated once in the official source material section above.