How severe is CVE-2021-44971?

CVE-2021-44971 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-2021-44971 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-44971?

CVE-2021-44971 primarily affects Tenda 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-2021-44971?

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-2021-44971 published?

CVE-2021-44971 was published on 2022-01-28 and last updated on 2026-07-05.

CVE-2021-44971

CVE-2021-44971 is a critical-severity vulnerability in Tenda 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-697.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (83rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-697
Affected product: Tenda Ac15 Firmware
Published: 2022-01-28
Last modified: 2026-07-05

Description

Multiple Tenda devices are affected by authentication bypass, such as AC15V1.0 Firmware V15.03.05.20_multi?AC5V1.0 Firmware V15.03.06.48_multi and so on. an attacker can obtain sensitive information, and even combine it with authenticated command injection to implement RCE.

Frequently asked questions

What is CVE-2021-44971?: Multiple Tenda devices are affected by authentication bypass, such as AC15V1.0 Firmware V15.03.05.20_multi?AC5V1.0 Firmware V15.03.06.48_multi and so on. an attacker can obtain sensitive information, and even combine it with authenticated command injection to implement RCE.
How severe is CVE-2021-44971?: CVE-2021-44971 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-2021-44971 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-44971?: CVE-2021-44971 primarily affects Tenda 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-2021-44971?: 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-2021-44971 published?: CVE-2021-44971 was published on 2022-01-28 and last updated on 2026-07-05.

References

Affected products (2)

cpe:2.3:o:tenda:ac15_firmware:15.03.05.20_multi:*:*:*:*:*:*:*
cpe:2.3:o:tenda:ac5_firmware:15.03.06.48_multi:*:*:*:*:*:*:*

More vulnerabilities in Tenda Ac15 Firmware

CVE-2026-24103 — Critical (CVSS 9.8): A buffer overflow vulnerability was discovered in goform/formSetMacFilterCfg in Tenda AC15V1.0 V15.03.05.18_multi.
CVE-2026-24105 — Critical (CVSS 9.8): An issue was discovered in goform/formsetUsbUnload in Tenda AC15V1.0 V15.03.05.18_multi. The value of `v1` was not…
CVE-2026-24101 — Critical (CVSS 9.8): An issue was discovered in goform/formSetIptv in Tenda AC15V1.0 V15.03.05.18_multi. When the condition is met, `s1_1`…
CVE-2025-63666 — Critical (CVSS 9.8): Tenda AC15 v15.03.05.18_multi) issues an authentication cookie that exposes the account password hash to the client and…
CVE-2025-29462 — Critical (CVSS 9.8): A buffer overflow vulnerability has been discovered in Tenda Ac15 V15.13.07.13. The vulnerability occurs when the…
CVE-2025-25632 — Critical (CVSS 9.8): Tenda AC15 v15.03.05.19 is vulnerable to Command Injection via the handler function in /goform/telnet.

All CVEs affecting Tenda Ac15 Firmware →

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CVE-2021-3833 — Critical (CVSS 9.8): Integria IMS login check uses a loose comparator ("==") to compare the MD5 hash of the password provided by the user…

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