How severe is CVE-2017-16923?

CVE-2017-16923 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-16923 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-16923?

CVE-2017-16923 primarily affects Tenda Ac9 Firmware. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-16923?

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-2017-16923 published?

CVE-2017-16923 was published on 2017-11-21 and last updated on 2026-06-17.

CVE-2017-16923

CVE-2017-16923 is a high-severity vulnerability in Tenda Ac9 Firmware with a CVSS 3.x base score of 8.8. 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-78.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 8.3
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Tenda Ac9 Firmware
Published: 2017-11-21
Last modified: 2026-06-17

Description

Command Injection vulnerability in app_data_center on Shenzhen Tenda Ac9 US_AC9V1.0BR_V15.03.05.14_multi_TD01, Ac9 ac9_kf_V15.03.05.19(6318_)_cn, Ac15 US_AC15V1.0BR_V15.03.05.18_multi_TD01, Ac15 US_AC15V1.0BR_V15.03.05.19_multi_TD01, Ac18 US_AC18V1.0BR_V15.03.05.05_multi_TD01, and Ac18 ac18_kf_V15.03.05.19(6318_)_cn devices allows remote unauthenticated attackers to execute arbitrary OS commands via a crafted cgi-bin/luci/usbeject?dev_name= GET request from the LAN. This occurs because the "sub_A6E8 usbeject_process_entry" function executes a system function with untrusted input.

Frequently asked questions

What is CVE-2017-16923?: Command Injection vulnerability in app_data_center on Shenzhen Tenda Ac9 US_AC9V1.0BR_V15.03.05.14_multi_TD01, Ac9 ac9_kf_V15.03.05.19(6318_)_cn, Ac15 US_AC15V1.0BR_V15.03.05.18_multi_TD01, Ac15 US_AC15V1.0BR_V15.03.05.19_multi_TD01, Ac18 US_AC18V1.0BR_V15.03.05.05_multi_TD01, and Ac18 ac18_kf_V15.03.05.19(6318_)_cn devices allows remote unauthenticated attackers to execute arbitrary OS commands via a crafted cgi-bin/luci/usbeject?dev_name= GET request from the LAN. This occurs because the "sub_A6E8 usbeject_process_entry" function executes a system function with untrusted input.
How severe is CVE-2017-16923?: CVE-2017-16923 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-16923 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-16923?: CVE-2017-16923 primarily affects Tenda Ac9 Firmware. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-16923?: 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-2017-16923 published?: CVE-2017-16923 was published on 2017-11-21 and last updated on 2026-06-17.

References

https://github.com/Iolop/Poc/tree/master/Router/Tenda

Affected products (6)

cpe:2.3:o:tenda:ac9_firmware:us_ac9v1.0br_v15.03.05.14_multi_td01:*:*:*:*:*:*:*
cpe:2.3:o:tenda:ac9_firmware:ac9_kf_v15.03.05.19\(6318_\)_cn:*:*:*:*:*:*:*
cpe:2.3:o:tenda:ac15_firmware:us_ac15v1.0br_v15.03.05.18_multi_td01:*:*:*:*:*:*:*
cpe:2.3:o:tenda:ac15_firmware:us_ac15v1.0br_v15.03.05.19_multi_td01:*:*:*:*:*:*:*
cpe:2.3:o:tenda:ac18_firmware:us_ac18v1.0br_v15.03.05.05_multi_td01:*:*:*:*:*:*:*
cpe:2.3:o:tenda:ac18_firmware:ac18_kf_v15.03.05.19\(6318_\)_cn:*:*:*:*:*:*:*

More vulnerabilities in Tenda Ac9 Firmware

CVE-2025-45042 — Critical (CVSS 9.8): Tenda AC9 v15.03.05.14 was discovered to contain a command injection vulnerability via the Telnet function.
CVE-2025-44877 — Critical (CVSS 9.8): Tenda AC9 V15.03.06.42_multi was found to contain a command injection vulnerability in the formSetSambaConf function…
CVE-2025-44872 — Critical (CVSS 9.8): Tenda AC9 V15.03.06.42_multi was found to contain a command injection vulnerability in the formsetUsbUnload function…
CVE-2025-45429 — Critical (CVSS 9.8): In the Tenda ac9 v1.0 router with firmware V15.03.05.14_multi, there is a stack overflow vulnerability in…
CVE-2025-45428 — Critical (CVSS 9.8): In Tenda ac9 v1.0 with firmware V15.03.05.14_multi, the rebootTime parameter of /goform/SetSysAutoRebbotCfg has a stack…
CVE-2025-45427 — Critical (CVSS 9.8): In Tenda AC9 v1.0 with firmware V15.03.05.14_multi, the security parameter of /goform/WifiBasicSet has a stack overflow…

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