CVE-2022-34747
CVE-2022-34747 is a critical-severity vulnerability in Zyxel Nas326 Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-134.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- EPSS exploit prediction: 2% (72nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-134
- Affected product: Zyxel Nas326 Firmware
- Published:
- Last modified:
Description
A format string vulnerability in Zyxel NAS326 firmware versions prior to V5.21(AAZF.12)C0 could allow an attacker to achieve unauthorized remote code execution via a crafted UDP packet.
Frequently asked questions
- What is CVE-2022-34747?
- A format string vulnerability in Zyxel NAS326 firmware versions prior to V5.21(AAZF.12)C0 could allow an attacker to achieve unauthorized remote code execution via a crafted UDP packet.
- How severe is CVE-2022-34747?
- CVE-2022-34747 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2022-34747 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2022-34747?
- CVE-2022-34747 affects Zyxel Nas326 Firmware. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2022-34747?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2022-34747 published?
- CVE-2022-34747 was published on 2022-09-06 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:o:zyxel:nas326_firmware:*:*:*:*:*:*:*:*
More vulnerabilities in Zyxel Nas326 Firmware
- CVE-2024-6342 — Critical (CVSS 9.8): **UNSUPPORTED WHEN ASSIGNED** A command injection vulnerability in the export-cgi program of Zyxel NAS326 firmware…
- CVE-2024-29974 — Critical (CVSS 9.8): ** UNSUPPORTED WHEN ASSIGNED ** The remote code execution vulnerability in the CGI program “file_upload-cgi” in…
- CVE-2024-29973 — Critical (CVSS 9.8): ** UNSUPPORTED WHEN ASSIGNED ** The command injection vulnerability in the “setCookie” parameter in Zyxel NAS326…
- CVE-2024-29972 — Critical (CVSS 9.8): ** UNSUPPORTED WHEN ASSIGNED ** The command injection vulnerability in the CGI program "remote_help-cgi" in Zyxel…
- CVE-2023-4474 — Critical (CVSS 9.8): The improper neutralization of special elements in the WSGI server of the Zyxel NAS326 firmware version…
- CVE-2023-4473 — Critical (CVSS 9.8): A command injection vulnerability in the web server of the Zyxel NAS326 firmware version V5.21(AAZF.14)C0 and NAS542…
All CVEs affecting Zyxel Nas326 Firmware →
Other CWE-134 vulnerabilities
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- CVE-2012-0242 — Critical (CVSS 10.0): Format string vulnerability in Advantech/BroadWin WebAccess before 7.0 allows remote attackers to execute arbitrary…
- CVE-2011-2475 — Critical (CVSS 10.0): Format string vulnerability in ECTrace.dll in the iMailGateway service in the Internet Mail Gateway in OneBridge Server…
- CVE-2011-1568 — Critical (CVSS 10.0): Format string vulnerability in the logText function in shmemmgr9.dll in IGSSdataServer.exe 9.00.00.11074, and…
- CVE-2010-4235 — Critical (CVSS 10.0): Format string vulnerability in RealNetworks Helix Server 12.x, 13.x, and 14.x before 14.2, and Helix Mobile Server…
- CVE-2011-0270 — Critical (CVSS 10.0): Format string vulnerability in nnmRptConfig.exe in HP OpenView Network Node Manager (OV NNM) 7.51 and 7.53 allows…