CVE-2021-29280
In TP-Link Wireless N Router WR840N an ARP poisoning attack can cause buffer overflow
In TP-Link Wireless N Router WR840N an ARP poisoning attack can cause buffer overflow
Attack profile
How easy it is to exploit
- Attack vector
- Adjacent network
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
In TP-Link Wireless N Router WR840N an ARP poisoning attack can cause buffer overflow
- Record
CVE-2021-29280- CVSS 3.1
- 6.4 Medium
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H - CVSS 2.0
- 4.3 Medium
AV:A/AC:M/Au:N/C:N/I:P/A:P - Weakness
- CWE-668
- Updated
- 2026-11-02
CVE List No score
In TP-Link Wireless N Router WR840N an ARP poisoning attack can cause buffer overflow
- Record
CVE-2021-29280- Updated
- 2026-11-02
EUVDEUVD-2021-15917 No score
In TP-Link Wireless N Router WR840N an ARP poisoning attack can cause buffer overflow
- Record
EUVD-2021-15917- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-qcq8-mgfx-4pfj No score
In TP-Link Wireless N Router WR840N an ARP poisoning attack can cause buffer overflow
In TP-Link Wireless N Router WR840N an ARP poisoning attack can cause buffer overflow
- Record
GHSA-qcq8-mgfx-4pfj- Weakness
- CWE-668
- 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-2021-29280 is a medium vulnerability (CVSS 6.4) in Tp-link Tl-wr840n Firmware, published August 19, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.75%, the 55th percentile. No source names a fixed version.
