How severe is CVE-2022-40862?

CVE-2022-40862 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-2022-40862 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-40862?

CVE-2022-40862 primarily affects Tendacn Ac15 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2022-40862?

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-2022-40862 published?

CVE-2022-40862 was published on 2022-09-23 and last updated on 2026-06-17.

CVE-2022-40862

CVE-2022-40862 is a critical-severity vulnerability in Tendacn Ac15 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% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Tendacn Ac15 Firmware
Published: 2022-09-23
Last modified: 2026-06-17

Description

Tenda AC15 and AC18 router V15.03.05.19 contains stack overflow vulnerability in the function fromNatStaticSetting with the request /goform/NatStaticSetting

Frequently asked questions

What is CVE-2022-40862?: Tenda AC15 and AC18 router V15.03.05.19 contains stack overflow vulnerability in the function fromNatStaticSetting with the request /goform/NatStaticSetting
How severe is CVE-2022-40862?: CVE-2022-40862 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-2022-40862 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-40862?: CVE-2022-40862 primarily affects Tendacn Ac15 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2022-40862?: 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-2022-40862 published?: CVE-2022-40862 was published on 2022-09-23 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:tendacn:ac15_firmware:15.03.05.19:*:*:*:*:*:*:*
cpe:2.3:o:tendacn:ac18_firmware:15.03.05.19:*:*:*:*:*:*:*

More vulnerabilities in Tendacn Ac15 Firmware

CVE-2022-40869 — Critical (CVSS 9.8): Tenda AC15 and AC18 routers V15.03.05.19 contain stack overflow vulnerabilities in the function fromDhcpListClient with…
CVE-2022-40865 — Critical (CVSS 9.8): Tenda AC15 and AC18 routers V15.03.05.19 contain heap overflow vulnerabilities in the function setSchedWifi with the…
CVE-2022-40864 — Critical (CVSS 9.8): Tenda AC15 and AC18 routers V15.03.05.19 contain stack overflow vulnerabilities in the function setSmartPowerManagement…
CVE-2022-40860 — Critical (CVSS 9.8): Tenda AC15 router V15.03.05.19 contains a stack overflow vulnerability in the function formSetQosBand->FUN_0007dd20…
CVE-2022-40853 — Critical (CVSS 9.8): Tenda AC15 router V15.03.05.19 contains a stack overflow via the list parameter at /goform/fast_setting_wifi_set
CVE-2022-38326 — Critical (CVSS 9.8): Tenda AC15 WiFi Router V15.03.05.19_multi and AC18 WiFi Router V15.03.05.19_multi were discovered to contain a buffer…

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