How severe is CVE-2018-16333?

CVE-2018-16333 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-16333 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-16333?

CVE-2018-16333 primarily affects Tendacn Ac18 Firmware. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-16333?

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

When was CVE-2018-16333 published?

CVE-2018-16333 was published on 2018-09-02 and last updated on 2026-06-17.

CVE-2018-16333

CVE-2018-16333 is a high-severity vulnerability in Tendacn Ac18 Firmware with a CVSS 3.x base score of 7.5. 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-119.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.8
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Tendacn Ac18 Firmware
Published: 2018-09-02
Last modified: 2026-06-17

Description

An issue was discovered on Tenda AC7 V15.03.06.44_CN, AC9 V15.03.05.19(6318)_CN, AC10 V15.03.06.23_CN, AC15 V15.03.05.19_CN, and AC18 V15.03.05.19(6318)_CN devices. There is a buffer overflow vulnerability in the router's web server. While processing the ssid parameter for a POST request, the value is directly used in a sprintf call to a local variable placed on the stack, which overrides the return address of the function, causing a buffer overflow.

Frequently asked questions

What is CVE-2018-16333?: An issue was discovered on Tenda AC7 V15.03.06.44_CN, AC9 V15.03.05.19(6318)_CN, AC10 V15.03.06.23_CN, AC15 V15.03.05.19_CN, and AC18 V15.03.05.19(6318)_CN devices. There is a buffer overflow vulnerability in the router's web server. While processing the ssid parameter for a POST request, the value is directly used in a sprintf call to a local variable placed on the stack, which overrides the return address of the function, causing a buffer overflow.
How severe is CVE-2018-16333?: CVE-2018-16333 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-16333 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-16333?: CVE-2018-16333 primarily affects Tendacn Ac18 Firmware. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2018-16333?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-16333 published?: CVE-2018-16333 was published on 2018-09-02 and last updated on 2026-06-17.

References

https://github.com/ZIllR0/Routers/blob/master/Tenda/oob1.md

Affected products (5)

cpe:2.3:o:tendacn:ac18_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:tendacn:ac15_firmware:15.03.05.19:*:*:*:*:*:*:*
cpe:2.3:o:tendacn:ac10_firmware:15.03.06.23:*:*:*:*:*:*:*
cpe:2.3:o:tendacn:ac9_firmware:15.03.05.19:*:*:*:*:*:*:*
cpe:2.3:o:tendacn:ac7_firmware:15.03.06.44:*:*:*:*:*:*:*

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