CVE-2022-34747 json
A format string vulnerability in Zyxel NAS326 firmware versions prior to V5.21(AAZF.12)C0 could allow an attacker to achieve unauthorized r…
published 2022-09-06 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-37696
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.8%
- EPSS 1.8% chance of exploitation in 30 days, percentile 78%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- zyxel nas326_firmware 5.21\(aazf.12\)c0
Exploit prediction
1.78% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Zyxel Zyxel NAS326 firmware
Classification
- Weakness
-
- CWE-134 Use of Externally-Controlled Format String
References
-
zyxel.com
/support/Zyxel-security-advisory-for-format-string-vulnerability-in-NAS.shtml
patch, vendor-advisory
Sources
- CVE List CVE-2022-34747
- NVD CVE-2022-34747
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