How severe is CVE-2018-18729?

CVE-2018-18729 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-2018-18729 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-18729?

CVE-2018-18729 primarily affects Tenda Ac7 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-2018-18729?

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-2018-18729 published?

CVE-2018-18729 was published on 2018-10-29 and last updated on 2026-06-17.

CVE-2018-18729

CVE-2018-18729 is a critical-severity vulnerability in Tenda Ac7 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)
CVSS v2: 9.0
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Tenda Ac7 Firmware
Published: 2018-10-29
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 heap-based buffer overflow vulnerability in the router's web server -- httpd. While processing the 'mac' parameter for a post request, the value is directly used in a strcpy to a variable placed on the heap, which can leak sensitive information or even hijack program control flow.

Frequently asked questions

What is CVE-2018-18729?: 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 heap-based buffer overflow vulnerability in the router's web server -- httpd. While processing the 'mac' parameter for a post request, the value is directly used in a strcpy to a variable placed on the heap, which can leak sensitive information or even hijack program control flow.
How severe is CVE-2018-18729?: CVE-2018-18729 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-2018-18729 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-18729?: CVE-2018-18729 primarily affects Tenda Ac7 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-2018-18729?: 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-2018-18729 published?: CVE-2018-18729 was published on 2018-10-29 and last updated on 2026-06-17.

References

https://github.com/ZIllR0/Routers/blob/master/Tenda/heapoverflow1.md

Affected products (5)

cpe:2.3:o:tenda:ac7_firmware:15.03.06.44_cn:*:*:*:*:*:*:*
cpe:2.3:o:tenda:ac9_firmware:15.03.05.19\(6318\)_cn:*:*:*:*:*:*:*
cpe:2.3:o:tenda:ac10_firmware:15.03.06.23_cn:*:*:*:*:*:*:*
cpe:2.3:o:tenda:ac15_firmware:15.03.05.19_cn:*:*:*:*:*:*:*
cpe:2.3:o:tenda:ac18_firmware:15.03.05.19\(6318\)_cn:*:*:*:*:*:*:*

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