Security Digest · Vulnerability record · Known exploited
CVE-2023-33538: TP-Link Multiple Routers Command Injection Vulnerability
Exploited in the wild (CISA KEV). 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 .
CISA KEV · added 2025-06-16 CVSS 8.8 High EPSS 41.6% · p99
Should you act?
Exploited: patch now if you run it
CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Yes, if you run TP-Link Multiple Routers. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-06-16, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-07-07; treat that as the outer limit, not the target.
- EPSS 41.6%, percentile 99: FIRST’s model estimates a 41.6% chance of exploitation activity in the next 30 days, higher than 99% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Needs an account (low (any account)). Exposure depends on who can log in.
What it is
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 .
CISA’s summary
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.
Weakness type: CWE-77.
Product: TP-Link Multiple Routers · Assigned by: mitre · Published: 2023-06-07
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| n/a | n/a | see vendor advisory |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADP | 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- Attack vector: network (remotely reachable)
- Attack complexity: low
- Privileges required: low (any account)
- User interaction: none
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: added 2025-06-16; federal due date 2025-07-07. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active, automatable yes, technical impact total.
- FIRST EPSS (model of 2026-10-21): 41.61% probability of exploitation activity in the next 30 days; percentile 99.
Timeline
- — CVE record published by mitre
- — Added to CISA’s Known Exploited Vulnerabilities catalog
- — CISA remediation deadline for US federal agencies
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- tp-link.com tp-link.com
- Listed in CISA KEV notes (tp-link.com) tp-link.com
Vulnerability records
- CVE.org record CVE-2023-33538 cve.org
- NVD entry CVE-2023-33538 nvd.nist.gov
Government
Other references from the CVE record and advisory
- github.com github.com
- web.archive.org web.archive.org
- secpod.com secpod.com
All exploited TP-Link vulnerabilities · Today’s Security Digest