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Fencer Vulns
high 8.8

CVE-2023-1389 kev in the critical feed json

TP-Link Archer AX21 (AX1800) firmware versions before 1.1.4 Build 20230219 contained a command injection vulnerability in the country form…

published 2023-03-15 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-23645

cvss
8.8
version 3.1, CNA
cisa kev
Exploited
added 2023-05-01
epss
100.0%
EPSS 100.0% chance of exploitation in 30 days, percentile 99.9%
public exploits
1
Exploit-DB, plus a Nuclei check

Summary

TP-Link Archer AX21 (AX1800) firmware versions before 1.1.4 Build 20230219 contained a command injection vulnerability in the country form of the /cgi-bin/luci;stok=/locale endpoint on the web management interface. Specifically, the country parameter of the write operation was not sanitized before being used in a call to popen(), allowing an unauthenticated attacker to inject commands, which would be run as root, with a simple POST request.

Patch / fix

cisa required action Apply updates per vendor instructions.

  • tp-link archer_ax21_firmware 1.1.4

Timeline

  1. Published
  2. Added to CISA KEV
  3. CISA patch deadline
  4. First public exploit (EDB-51677)
  5. CISA SSVC: exploitation active

Known exploited

Added
3 y ago
Patch by
2023-05-22 (3 y ago)
Ransomware
Not known
Required action
Apply updates per vendor instructions.
Vendor, product
TP-Link, Archer AX21
CISA name
TP-Link Archer AX-21 Command Injection Vulnerability

ATT&CK techniques

How it is exploited and what it leads to, in MITRE ATT&CK terms.

  • T1106 Native API exploitation
  • T1496 Resource Hijacking primary impact
  • T1041 Exfiltration Over C2 Channel secondary impact
  • T1070 Indicator Removal secondary impact
  • T1498 Network Denial of Service secondary impact

kev release 2025-07-28, att&ck v16.1. KEV to ATT&CK mappings by the MITRE Center for Threat-Informed Defense (Mappings Explorer, Apache-2.0). © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. Terms of use

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
total
Assessed
2 y ago

Exploit prediction

100.00% chance of exploitation in the next 30 days, higher than 99.9% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-51677 TP-Link Archer AX21 - Unauthenticated Command Injection remote, 2023-08-10
  • Nuclei template TP-Link Archer AX21 (AX1800) - Unauthenticated Command Injection nuclei detection template
  • tenable.com https://www.tenable.com/security/research/tra-2023-11 referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/174131/TP-Link-Archer-AX21-Command-Injection.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.8 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 8.8 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • n/a TP-Link Archer AX21 (AX1800)

Classification

Weakness
  • CWE-77 Improper Neutralization of Special Elements used in a Command

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.