CVE-2022-40070
CVE-2022-40070 is a high-severity vulnerability in Tenda Ac21 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-787.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- EPSS exploit prediction: 1% (54th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Tenda Ac21 Firmware
- Published:
- Last modified:
Description
Tenda AC21 V 16.03.08.15 is vulnerable to Buffer Overflow via bin/httpd, function: formSetFirewallCfg.
Frequently asked questions
- What is CVE-2022-40070?
- Tenda AC21 V 16.03.08.15 is vulnerable to Buffer Overflow via bin/httpd, function: formSetFirewallCfg.
- How severe is CVE-2022-40070?
- CVE-2022-40070 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-2022-40070 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2022-40070?
- CVE-2022-40070 affects Tenda Ac21 Firmware. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2022-40070?
- 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-2022-40070 published?
- CVE-2022-40070 was published on 2022-09-19 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:o:tenda:ac21_firmware:16.03.08.15:*:*:*:*:*:*:*
More vulnerabilities in Tenda Ac21 Firmware
- CVE-2025-9605 — Critical (CVSS 9.8): A security vulnerability has been detected in Tenda AC21 and AC23 16.03.08.16. Affected is the function…
- CVE-2026-4565 — High (CVSS 8.8): A vulnerability was detected in Tenda AC21 16.03.08.16. Impacted is the function formSetQosBand of the file…
- CVE-2026-1637 — High (CVSS 8.8): A vulnerability was identified in Tenda AC21 16.03.08.16. The affected element is the function fromAdvSetMacMtuWan of…
- CVE-2025-13446 — High (CVSS 8.8): A vulnerability has been found in Tenda AC21 16.03.08.16. This vulnerability affects unknown code of the file…
- CVE-2025-13445 — High (CVSS 8.8): A flaw has been found in Tenda AC21 16.03.08.16. This affects an unknown part of the file /goform/SetIpMacBind.…
- CVE-2025-12611 — High (CVSS 8.8): A vulnerability was identified in Tenda AC21 16.03.08.16. This vulnerability affects the function formSetPPTPServer of…
All CVEs affecting Tenda Ac21 Firmware →
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