Buffer overflow in Zyxel NR7101 firmware
Priority MEDIUM 49CWE-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
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.
Summary
A buffer overflow vulnerability in the library of the web server in Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0, which could allow an unauthenticated attacker to execute some OS commands or to cause denial-of-service (DoS) conditions on a vulnerable device.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00633 50th percentileScored 2026-11-07
Fix Fixed NR7101 firmware (Zyxel): V1.15(ACCC.3)C0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Zyxel | NR7101 firmware | before V1.15(ACCC.3)C0 | V1.15(ACCC.3)C0 | Patch available | CNA |
- NR7101 firmware VendorZyxel Affected before V1.15(ACCC.3)C0 Fixed in V1.15(ACCC.3)C0 Patch available CNA
CPE configurations NVD · 34
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:zyxel:lte3202-m437_firmware:*:*:*:*:*:*:*:* | before 1.00\(abwf.1\)c0 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:lte3202-m437:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:lte3316-m604_firmware:*:*:*:*:*:*:*:* | before 2.00\(abmp.6\)c0 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:lte3316-m604:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:lte7480-m804_firmware:*:*:*:*:*:*:*:* | before 1.00\(abra.6\)c0 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:lte7480-m804:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:lte7490-m904_firmware:*:*:*:*:*:*:*:* | before 1.00\(abqy.5\)c0 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:lte7490-m904:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:nebula_fwa510_firmware:*:*:*:*:*:*:*:* | before 1.15\(acgd.3\)c0 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:nebula_fwa510:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
- cpe:2.3:o:zyxel:lte3202-m437_firmware:*:*:*:*:*:*:*:* Versions before 1.00\(abwf.1\)c0 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:lte3202-m437:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:lte3316-m604_firmware:*:*:*:*:*:*:*:* Versions before 2.00\(abmp.6\)c0 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:lte3316-m604:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:lte7480-m804_firmware:*:*:*:*:*:*:*:* Versions before 1.00\(abra.6\)c0 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:lte7480-m804:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:lte7490-m904_firmware:*:*:*:*:*:*:*:* Versions before 1.00\(abqy.5\)c0 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:lte7490-m904:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:nebula_fwa510_firmware:*:*:*:*:*:*:*:* Versions before 1.15\(acgd.3\)c0 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:nebula_fwa510:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
Show 24 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:zyxel:nebula_fwa710_firmware:*:*:*:*:*:*:*:* | before 1.15\(acgc.3\)c0 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:nebula_fwa710:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:nebula_nr7101_firmware:*:*:*:*:*:*:*:* | before 1.15\(accc.3\)c0 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:nebula_nr7101:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:nr5103_firmware:*:*:*:*:*:*:*:* | before 4.19\(abyc.3\)c0 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:nr5103:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:nr5103e_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:nr5103e:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:nr7101_firmware:*:*:*:*:*:*:*:* | before 1.00\(abuv.7\)c0 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:nr7101:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:nr7102_firmware:*:*:*:*:*:*:*:* | before 1.00\(abyd.2\)c0 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:nr7102:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:nr7103_firmware:*:*:*:*:*:*:*:* | before 1.00\(accz.1\)c0 | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:nr7103:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:ep240p_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:ep240p:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:pm7320-b0_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:pm7320-b0:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:pmg5317-t20b_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:pmg5317-t20b:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:pmg5617ga_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:pmg5617ga:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
| cpe:2.3:o:zyxel:pmg5622ga_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Zyxel |
| cpe:2.3:h:zyxel:pmg5622ga:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Zyxel |
- cpe:2.3:o:zyxel:nebula_fwa710_firmware:*:*:*:*:*:*:*:* Versions before 1.15\(acgc.3\)c0 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:nebula_fwa710:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:nebula_nr7101_firmware:*:*:*:*:*:*:*:* Versions before 1.15\(accc.3\)c0 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:nebula_nr7101:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:nr5103_firmware:*:*:*:*:*:*:*:* Versions before 4.19\(abyc.3\)c0 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:nr5103:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:nr5103e_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:nr5103e:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:nr7101_firmware:*:*:*:*:*:*:*:* Versions before 1.00\(abuv.7\)c0 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:nr7101:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:nr7102_firmware:*:*:*:*:*:*:*:* Versions before 1.00\(abyd.2\)c0 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:nr7102:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:nr7103_firmware:*:*:*:*:*:*:*:* Versions before 1.00\(accz.1\)c0 Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:nr7103:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:ep240p_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:ep240p:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:pm7320-b0_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:pm7320-b0:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:pmg5317-t20b_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:pmg5317-t20b:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:pmg5617ga_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:pmg5617ga:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
- cpe:2.3:o:zyxel:pmg5622ga_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Zyxel
- cpe:2.3:h:zyxel:pmg5622ga:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
Remediation
- Fix · CNA NR7101 firmware (Zyxel) Fixed in V1.15(ACCC.3)C0
Timeline
- 2026-10-02 Threatist record created from CVE-2022-43389
- 2026-10-03 Alias added: GHSA-356g-gwg5-3vmc
- 2026-10-30 EPSS moved to the 50th–90th percentile
References
More Zyxel Ep240p Firmware vulnerabilities
- TI-2022-09765 OS command injection in Zyxel VMG3312-T20A firmware CVSS 3.1HIGH 8.0
- TI-2021-14002 Cleartext storage of sensitive information in Zyxel VMG3625-T50B firmware CVSS 3.1MEDIUM 6.5
- TI-2022-09766 Buffer overflow in Zyxel VMG3312-T20A firmware CVSS 3.1MEDIUM 6.0
Sources
- CVE-2022-43389 · CVE Program
- CVE-2022-43389 · NVD
- FIRST EPSS
- GHSA-356g-gwg5-3vmc · 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