CVE-2020-22079

Name: CVE-2020-22079
Creator: NVD / NIST
Published: 2021-10-29T11:15:08.31+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 4.00%

Last modified Jun 17, 2026

CVE-2020-22079 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 4.00% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

4.00%

89.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Tendacn	Ac10u Firmware	15.03.06.48_multi_tde01
Tendacn	Ac9 Firmware	15.03.05.19\(6318\)
Tendacn	Ac9 Firmware	15.03.06.42_multi

References

https://cwe.mitre.org/data/definitions/121.htmlTechnical Description
https://github.com/1sd3d/Tendown/tree/master/PoCs/Auth/bof11Broken Link
https://github.com/Lyc-heng/routers/blob/main/routers/stack1.mdExploit, Third Party Advisory
https://cwe.mitre.org/data/definitions/121.htmlTechnical Description
https://github.com/1sd3d/Tendown/tree/master/PoCs/Auth/bof11Broken Link
https://github.com/Lyc-heng/routers/blob/main/routers/stack1.mdExploit, Third Party Advisory

Timeline

Published: Oct 29, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-22079?

How severe is CVE-2020-22079?

CVE-2020-22079 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.00% probability of exploitation in the next 30 days.

How do I fix CVE-2020-22079?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-22079?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST