Asus RT-AC68U <3.0.0.4.385.20633 and RT-AC5300 <3.0.0.4.384.82072 are affected by a…
Priority MEDIUM 45CWE-120Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.
Summary
Asus RT-AC68U <3.0.0.4.385.20633 and RT-AC5300 <3.0.0.4.384.82072 are affected by a buffer overflow in blocking_request.cgi.
Why it matters now
EPSS 0.01243 69th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:asus:rt-ac68u_firmware:*:*:*:*:*:*:*:* | before 3.0.0.4.385.20633 | Vulnerable | ASUS |
| cpe:2.3:h:asus:rt-ac68u:-:*:*:*:*:*:*:* | not specified by NVD | Running on | ASUS |
| cpe:2.3:o:asus:rt-ac5300_firmware:*:*:*:*:*:*:*:* | before 3.0.0.4.384.82072 | Vulnerable | ASUS |
| cpe:2.3:h:asus:rt-ac5300:-:*:*:*:*:*:*:* | not specified by NVD | Running on | ASUS |
- cpe:2.3:o:asus:rt-ac68u_firmware:*:*:*:*:*:*:*:* Versions before 3.0.0.4.385.20633 Vulnerable ·ASUS
- cpe:2.3:h:asus:rt-ac68u:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·ASUS
- cpe:2.3:o:asus:rt-ac5300_firmware:*:*:*:*:*:*:*:* Versions before 3.0.0.4.384.82072 Vulnerable ·ASUS
- cpe:2.3:h:asus:rt-ac5300:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·ASUS
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-45756
- 2026-10-03 Alias added: GHSA-h374-84hv-hj85
References
Exploit 1
More ASUS Rt-ac5300 Firmware vulnerabilities
- TI-2021-02220 In ASUS RT-AX3000, ZenWiFi AX (XT8), RT-AX88U, and other ASUS routers with firmware <… CVSS 3.1HIGH 7.5
- TI-2018-06731 Main_Analysis_Content.asp in /apply.cgi on ASUS RT-AC66U, RT-AC68U, RT-AC86U, RT-AC88U… CVSS 3.0CRITICAL 9.8
- TI-2021-19533 ASUS RT-A88U 3.0.0.4.386_45898 is vulnerable to Cross Site Scripting (XSS). CVSS 3.1CRITICAL 9.0
Sources
- CVE-2021-45756 · CVE Program
- CVE-2021-45756 · NVD
- FIRST EPSS
- GHSA-h374-84hv-hj85 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences