CVE-2021-35035
A cleartext storage of sensitive information vulnerability in the Zyxel NBG6604 firmware could...
A cleartext storage of sensitive information vulnerability in the Zyxel NBG6604 firmware could allow a remote, authenticated attacker to obtain sensitive information from the configuration file.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
A cleartext storage of sensitive information vulnerability in the Zyxel NBG6604 firmware could allow a remote, authenticated attacker to obtain sensitive information from the configuration file.
- Record
CVE-2021-35035- CVSS 3.1
- 4.9 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-312
- Updated
- 2026-11-02
EUVDEUVD-2021-21682
A cleartext storage of sensitive information vulnerability in the Zyxel NBG6604 firmware could allow a remote, authenticated attacker to obtain sensitive information from the configuration file.
- Record
EUVD-2021-21682- CVSS 3.1
- 4.9 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-778x-386c-73gw No score
A cleartext storage of sensitive information vulnerability in the Zyxel NBG6604 firmware could...
A cleartext storage of sensitive information vulnerability in the Zyxel NBG6604 firmware could allow a remote, authenticated attacker to obtain sensitive information from the configuration file.
- Record
GHSA-778x-386c-73gw- Weakness
- CWE-312
- Updated
- 2026-11-02
NVD
A cleartext storage of sensitive information vulnerability in the Zyxel NBG6604 firmware could allow a remote, authenticated attacker to obtain sensitive information from the configuration file.
- Record
CVE-2021-35035- CVSS 3.1
- 4.9 Medium
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N - CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 4.0 Medium
AV:N/AC:L/Au:S/C:P/I:N/A:N - Weakness
- CWE-312
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-35035 is a medium vulnerability (CVSS 4.9) in Zyxel Nbg6604 Firmware, published December 29, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.67%, the 52nd percentile. No source names a fixed version.