How severe is CVE-2020-22079?

CVE-2020-22079 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-2020-22079 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-22079?

CVE-2020-22079 primarily affects Tendacn Ac10u Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-22079?

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-2020-22079 published?

CVE-2020-22079 was published on 2021-10-29 and last updated on 2026-06-17.

CVE-2020-22079

CVE-2020-22079 is a critical-severity vulnerability in Tendacn Ac10u 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: 7.5
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Tendacn Ac10u Firmware
Published: 2021-10-29
Last modified: 2026-06-17

Description

Stack-based buffer overflow in Tenda AC-10U AC1200 Router US_AC10UV1.0RTL_V15.03.06.48_multi_TDE01 allows remote attackers to execute arbitrary code via the timeZone parameter to goform/SetSysTimeCfg.

Frequently asked questions

What is CVE-2020-22079?: Stack-based buffer overflow in Tenda AC-10U AC1200 Router US_AC10UV1.0RTL_V15.03.06.48_multi_TDE01 allows remote attackers to execute arbitrary code via the timeZone parameter to goform/SetSysTimeCfg.
How severe is CVE-2020-22079?: CVE-2020-22079 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-2020-22079 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-22079?: CVE-2020-22079 primarily affects Tendacn Ac10u Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-22079?: 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-2020-22079 published?: CVE-2020-22079 was published on 2021-10-29 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:o:tendacn:ac10u_firmware:15.03.06.48_multi_tde01:*:*:*:*:*:*:*
cpe:2.3:o:tendacn:ac9_firmware:15.03.05.19\(6318\):*:*:*:*:*:*:*
cpe:2.3:o:tendacn:ac9_firmware:15.03.06.42_multi:*:*:*:*:*:*:*

More vulnerabilities in Tendacn Ac10u Firmware

CVE-2023-44023 — Critical (CVSS 9.8): Tenda AC10U v1.0 US_AC10UV1.0RTL_V15.03.06.49_multi_TDE01 was discovered to contain a stack overflow via the ssid…
CVE-2023-44022 — Critical (CVSS 9.8): Tenda AC10U v1.0 US_AC10UV1.0RTL_V15.03.06.49_multi_TDE01 was discovered to contain a stack overflow via the speed_dir…
CVE-2023-44021 — Critical (CVSS 9.8): Tenda AC10U v1.0 US_AC10UV1.0RTL_V15.03.06.49_multi_TDE01 was discovered to contain a stack overflow via the…
CVE-2023-44020 — Critical (CVSS 9.8): Tenda AC10U v1.0 US_AC10UV1.0RTL_V15.03.06.49_multi_TDE01 was discovered to contain a stack overflow via the security…
CVE-2023-44019 — Critical (CVSS 9.8): Tenda AC10U v1.0 US_AC10UV1.0RTL_V15.03.06.49_multi_TDE01 was discovered to contain a stack overflow via the mac…
CVE-2023-44018 — Critical (CVSS 9.8): Tenda AC10U v1.0 US_AC10UV1.0RTL_V15.03.06.49_multi_TDE01 was discovered to contain a stack overflow via the domain…

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