How severe is CVE-2023-33538?

CVE-2023-33538 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-33538 being actively exploited?

Yes. CVE-2023-33538 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-06-16, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2023-33538?

CVE-2023-33538 primarily affects Tp-link Tl-wr940n Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-33538?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2023-33538 have an EU (EUVD) identifier?

Yes. CVE-2023-33538 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-37697. It is also flagged as exploited in the EUVD (since 2025-06-16).

When was CVE-2023-33538 published?

CVE-2023-33538 was published on 2023-06-07 and last updated on 2026-06-17.

CVE-2023-33538

CVE-2023-33538 is a high-severity vulnerability in Tp-link Tl-wr940n Firmware with a CVSS 3.x base score of 8.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2025-06-16). The underlying weakness is classified as CWE-77.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 42% (99th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2025-06-16)
EU (EUVD) id: EUVD-2023-37697
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2025-06-16)
Weakness: CWE-77
Affected product: Tp-link Tl-wr940n Firmware
Published: 2023-06-07
Last modified: 2026-06-17

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 .

Frequently asked questions

What is CVE-2023-33538?: 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 .
How severe is CVE-2023-33538?: CVE-2023-33538 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-33538 being actively exploited?: Yes. CVE-2023-33538 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-06-16, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2023-33538?: CVE-2023-33538 primarily affects Tp-link Tl-wr940n Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-33538?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2023-33538 have an EU (EUVD) identifier?: Yes. CVE-2023-33538 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-37697. It is also flagged as exploited in the EUVD (since 2025-06-16).
When was CVE-2023-33538 published?: CVE-2023-33538 was published on 2023-06-07 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:o:tp-link:tl-wr940n_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:tp-link:tl-wr841n_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:tp-link:tl-wr740n_firmware:-:*:*:*:*:*:*:*

More vulnerabilities in Tp-link Tl-wr940n Firmware

CVE-2023-36355 — Critical (CVSS 9.9): TP-Link TL-WR940N V4 was discovered to contain a buffer overflow via the ipStart parameter at…
CVE-2022-43636 — High (CVSS 8.8): This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of TP-Link…
CVE-2022-24355 — High (CVSS 8.8): This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link…
CVE-2019-6989 — High (CVSS 8.8): TP-Link TL-WR940N is vulnerable to a stack-based buffer overflow, caused by improper bounds checking by the…
CVE-2025-6151 — High (CVSS 8.2): A vulnerability has been found in TP-Link TL-WR940N V4 and TL-WR841N V11. Affected by this issue is some unknown…
CVE-2023-33537 — High (CVSS 8.1): TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2 was discovered to contain a buffer overflow via the…

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