Out-of-bounds write in MF971R
Priority MEDIUM 45CWE-787Published · 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-787 and the CVSS impact.
Summary
ZTE MF971R product has two stack-based buffer overflow vulnerabilities. An attacker could exploit the vulnerabilities to execute arbitrary code.
Why it matters now
EPSS 0.01617 76th percentileScored 2026-11-07
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 |
|---|---|---|---|---|---|
| — | MF971R | BD_ZTE_MF971RV1.0.0B05, BD_PLKPLMF971R1V1.0.0B06, BD_MF971R2V1.0.0B03, BD_ZTE_MF971RS2V1.0.0B03, BD_ZTE_MF971RSV1.0.0B05 | — | No fix listed | CNA |
- MF971R Vendor— Affected BD_ZTE_MF971RV1.0.0B05, BD_PLKPLMF971R1V1.0.0B06, BD_MF971R2V1.0.0B03, BD_ZTE_MF971RS2V1.0.0B03, BD_ZTE_MF971RSV1.0.0B05 Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:zte:mf971r_firmware:v1.0.0b05:*:*:*:*:*:*:* | v1.0.0b05 | Vulnerable | ZTE |
| cpe:2.3:h:zte:mf971r:*:*:*:*:*:*:*:* | all versions | Running on | ZTE |
| cpe:2.3:o:zte:mf971r_firmware:1v1.0.0b06:*:*:*:*:*:*:* | 1v1.0.0b06 | Vulnerable | ZTE |
| cpe:2.3:o:zte:mf971r_firmware:2v1.0.0b03:*:*:*:*:*:*:* | 2v1.0.0b03 | Vulnerable | ZTE |
| cpe:2.3:o:zte:mf971r_firmware:s2v1.0.0b03:*:*:*:*:*:*:* | s2v1.0.0b03 | Vulnerable | ZTE |
| cpe:2.3:o:zte:mf971r_firmware:sv1.0.0b05:*:*:*:*:*:*:* | sv1.0.0b05 | Vulnerable | ZTE |
- cpe:2.3:o:zte:mf971r_firmware:v1.0.0b05:*:*:*:*:*:*:* Versions v1.0.0b05 Vulnerable ·ZTE
- cpe:2.3:h:zte:mf971r:*:*:*:*:*:*:*:* Versions all versions Running on ·ZTE
- cpe:2.3:o:zte:mf971r_firmware:1v1.0.0b06:*:*:*:*:*:*:* Versions 1v1.0.0b06 Vulnerable ·ZTE
- cpe:2.3:o:zte:mf971r_firmware:2v1.0.0b03:*:*:*:*:*:*:* Versions 2v1.0.0b03 Vulnerable ·ZTE
- cpe:2.3:o:zte:mf971r_firmware:s2v1.0.0b03:*:*:*:*:*:*:* Versions s2v1.0.0b03 Vulnerable ·ZTE
- cpe:2.3:o:zte:mf971r_firmware:sv1.0.0b05:*:*:*:*:*:*:* Versions sv1.0.0b05 Vulnerable ·ZTE
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-21749
- 2026-10-03 Alias added: GHSA-q2w2-7h8m-xxvx
References
More ZTE Mf971r Firmware vulnerabilities
- TI-2021-04812 Cross-site request forgery in MF971R CVSS 3.1MEDIUM 4.3
- TI-2021-04815 Out-of-bounds write in MF971R CVSS 3.1CRITICAL 9.8
- TI-2021-04811 ZTE MF971R product has a configuration file control vulnerability. CVSS 3.1HIGH 7.5
- TI-2021-04814 Cross-site scripting in MF971R CVSS 3.1MEDIUM 6.1
- TI-2021-04813 Cross-site scripting in MF971R CVSS 3.1MEDIUM 6.1
- TI-2021-04810 Injection in MF971R CVSS 3.1MEDIUM 4.3
Sources
- CVE-2021-21749 · CVE Program
- CVE-2021-21749 · NVD
- FIRST EPSS
- GHSA-q2w2-7h8m-xxvx · GitHub Advisory Database · CC BY 4.0
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