How severe is CVE-2023-38940?

CVE-2023-38940 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-38940 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-38940?

CVE-2023-38940 primarily affects Tenda Fh1203 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-2023-38940?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-38940 published?

CVE-2023-38940 was published on 2023-08-07 and last updated on 2026-06-17.

CVE-2023-38940

CVE-2023-38940 is a critical-severity vulnerability in Tenda Fh1203 Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Tenda Fh1203 Firmware
Published: 2023-08-07
Last modified: 2026-06-17

Description

Tenda F1203 V2.0.1.6, FH1203 V2.0.1.6 and FH1205 V2.0.0.7(775) were discovered to contain a stack overflow via the ssid parameter in the form_fast_setting_wifi_set function.

Frequently asked questions

What is CVE-2023-38940?: Tenda F1203 V2.0.1.6, FH1203 V2.0.1.6 and FH1205 V2.0.0.7(775) were discovered to contain a stack overflow via the ssid parameter in the form_fast_setting_wifi_set function.
How severe is CVE-2023-38940?: CVE-2023-38940 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-38940 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-38940?: CVE-2023-38940 primarily affects Tenda Fh1203 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-2023-38940?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-38940 published?: CVE-2023-38940 was published on 2023-08-07 and last updated on 2026-06-17.

References

https://github.com/FirmRec/IoT-Vulns/tree/main/tenda/form_fast_setting_wifi_set

Affected products (3)

cpe:2.3:o:tenda:fh1203_firmware:2.0.1.6:*:*:*:*:*:*:*
cpe:2.3:o:tenda:f1203_firmware:2.0.1.6:*:*:*:*:*:*:*
cpe:2.3:o:tenda:fh1205_firmware:2.0.0.7\(775\):*:*:*:*:*:*:*

More vulnerabilities in Tenda Fh1203 Firmware

CVE-2024-30602 — Critical (CVSS 9.8): Tenda FH1203 v2.0.1.6 has a stack overflow vulnerability in the schedStartTime parameter of the setSchedWifi function.
CVE-2023-38936 — Critical (CVSS 9.8): Tenda AC10 V1.0 V15.03.06.23, AC1206 V15.03.06.23, AC6 V2.0 V15.03.06.23, AC7 V1.0 V15.03.06.44, AC5 V1.0 V15.03.06.28,…
CVE-2023-38934 — Critical (CVSS 9.8): Tenda F1203 V2.0.1.6, FH1203 V2.0.1.6 and FH1205 V2.0.0.7(775) was discovered to contain a stack overflow via the…
CVE-2023-38933 — Critical (CVSS 9.8): Tenda AC6 V2.0 V15.03.06.23, AC7 V1.0 V15.03.06.44, F1203 V2.0.1.6, AC5 V1.0 V15.03.06.28, FH1203 V2.0.1.6 and AC9 V3.0…
CVE-2023-38931 — Critical (CVSS 9.8): Tenda AC10 V1.0 V15.03.06.23, AC1206 V15.03.06.23, AC8 v4 V16.03.34.06, AC6 V2.0 V15.03.06.23, AC7 V1.0 V15.03.06.44,…
CVE-2023-37707 — Critical (CVSS 9.8): Tenda FH1203 V2.0.1.6 was discovered to contain a stack overflow via the page parameter in the fromVirtualSer function.

All CVEs affecting Tenda Fh1203 Firmware →

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