CVE-2018-21131
Certain NETGEAR devices are affected by unauthenticated firmware downgrade. This affects WAC505...
Certain NETGEAR devices are affected by unauthenticated firmware downgrade. This affects WAC505 before 5.0.0.17 and WAC510 before 5.0.0.17.
Attack profile
How easy it is to exploit
- Attack vector
- Adjacent network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Certain NETGEAR devices are affected by unauthenticated firmware downgrade. This affects WAC505 before 5.0.0.17 and WAC510 before 5.0.0.17.
- Record
CVE-2018-21131- CVSS 3.0
- 8.1 High
CVSS:3.0/AC:L/AV:A/A:H/C:N/I:H/PR:N/S:U/UI:N - Updated
- 2026-11-02
EUVDEUVD-2018-13649
Certain NETGEAR devices are affected by unauthenticated firmware downgrade. This affects WAC505 before 5.0.0.17 and WAC510 before 5.0.0.17.
- Record
EUVD-2018-13649- CVSS 3.0
- 8.1 High
CVSS:3.0/AC:L/AV:A/A:H/C:N/I:H/PR:N/S:U/UI:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-jc5f-m375-x98q No score
Certain NETGEAR devices are affected by unauthenticated firmware downgrade. This affects WAC505...
Certain NETGEAR devices are affected by unauthenticated firmware downgrade. This affects WAC505 before 5.0.0.17 and WAC510 before 5.0.0.17.
- Record
GHSA-jc5f-m375-x98q- Updated
- 2026-11-02
NVD
Certain NETGEAR devices are affected by unauthenticated firmware downgrade. This affects WAC505 before 5.0.0.17 and WAC510 before 5.0.0.17.
- Record
CVE-2018-21131- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H - CVSS 3.0
- 8.1 High
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H - CVSS 2.0
- 6.4 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:P - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-21131 is a high vulnerability (CVSS 8.1) in Netgear Wac505 Firmware, published April 23, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.31%, the 70th percentile. No source names a fixed version.