HOMEVULNERABILITIESCVE-2020-22079
CRITICAL

CVE-2020-22079

CWE-787Published: October 29, 2021· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2020-22079 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

tendacn4 product(s)
ac10u firmwareac10uac9 firmwareac9
Source: NVD CPE · 6 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://github.com/Lyc-heng/routers/blob/main/routers/stack1.md
ADVISORYhttps://github.com/Lyc-heng/routers/blob/main/routers/stack1.md

All References (6)

→
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

Quick Facts

CVE IDCVE-2020-22079
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-787
CISA KEVNo
Affected1 vendor(s)
PublishedOct 29, 2021

Related CVEs (CWE-787)

CVE-2019-5049
10.0
CVE-2004-1287
10.0
CVE-2016-9343
10.0
CVE-2019-6235
10.0
CVE-2015-0235
10.0
CVE-2004-0574
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-22079 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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