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CVE-2024-21821

23
FAUCET Score

CVE-2024-21821 is a critical vulnerability affecting multiple TP-Link Archer series routers, including the AX3000, AX5400, and AXE75 models. This flaw allows an authenticated attacker, with network-adjacent access via LAN or Wi-Fi, to execute arbitrary operating system commands. Rated with a CVSS score of 8.0 (High), the vulnerability has a low attack complexity and requires low privileges, enabling high impact on confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.1.2CPE matchmatch criteria
cpe:2.3:o:tp-link:archer_ax3000_firmware:*:*:*:*:*:*:*:*
< 1.1.2CPE matchmatch criteria
cpe:2.3:o:tp-link:archer_ax5400_firmware:*:*:*:*:*:*:*:*
< 1.1.9CPE matchmatch criteria
cpe:2.3:o:tp-link:archer_axe75_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.0HIGH

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.1
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.45%
Probability of exploitation in next 30 days
EPSS Percentile
36.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0045 is in the 27th percentile among its peer group of 554 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

jvn.jp / en/vu/JVNVU91401812
Third Party Advisory
tp-link.com / jp/support/download/archer-air-r5/v1
tp-link.com / jp/support/download/archer-ax3000
Product
tp-link.com / jp/support/download/archer-ax5400
Product
tp-link.com / jp/support/download/archer-axe75
Product