CVE-2023-33538: TP-Link Multiple Routers Command Injection Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 16 Jun 2025, 740 days after the CVE record was published.

How likely is exploitation in the next 30 days?

41.6%

EPSS score, percentile 98.7 of all scored records

How severe?

8.8 High

CVSS v3.1 base score, from CISA's enrichment of the record

What should I do?

Required action (CISA), due 7 Jul 2025: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Not stated. The CVE record gives vendor and product as “n/a” and the version as “unspecified”.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

CISA due date for this action: 7 July 2025.

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

Linked from CISA's catalog entry

• https://www.tp-link.com/nordic/support/faq/3562/
• https://nvd.nist.gov/vuln/detail/CVE-2023-33538

Affected products and versions

The CVE record does not name affected products or versions: vendor and product are “n/a” and the version is “unspecified”.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2 contain a command injection vulnerability via the component /userRpm/WlanNetworkRpm. The impacted products could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

• CISA added CVE-2023-33538 to its Known Exploited Vulnerabilities (KEV) catalog on 16 Jun 2025.
• CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
• The due date CISA sets for the required action is 7 Jul 2025.
• The CVE record was published on 7 Jun 2023, 740 days before it was added to KEV.
• The CVE record carries a CVSS v3.1 base score of 8.8 (High), taken from CISA's enrichment of the record.
• FIRST's EPSS model puts the probability of exploitation in the next 30 days at 41.6% (percentile 98.7), as of 28 Oct 2026.
• CISA's SSVC assessment in the CVE record: exploitation active, automatable yes, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2 was discovered to contain a command injection vulnerability via the component /userRpm/WlanNetworkRpm .

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

• CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

References

• github.com
• web.archive.org
• secpod.com

More exploited TP-Link vulnerabilities

• CVE-2023-50224: TP-Link TL-WR841N Authentication Bypass by Spoofing Vulnerability (added 3 Sep 2025)
• CVE-2025-9377: TP-Link Archer C7(EU) and TL-WR841N/ND(MS) OS Command Injection Vulnerability (added 3 Sep 2025)
• CVE-2020-24363: TP-link TL-WA855RE Missing Authentication for Critical Function Vulnerability (added 2 Sep 2025)
• CVE-2023-1389: TP-Link Archer AX-21 Command Injection Vulnerability (added 1 May 2023)
• CVE-2015-3035: TP-Link Multiple Archer Devices Directory Traversal Vulnerability (added 25 Mar 2022)