HOMEVULNERABILITIESCVE-2020-13392
CRITICAL

CVE-2020-13392

CWE-120Published: May 22, 2020· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

An issue was discovered on Tenda AC6 V1.0 V15.03.05.19_multi_TD01, AC9 V1.0 V15.03.05.19(6318)_CN, AC9 V3.0 V15.03.06.42_multi, AC15 V1.0 V15.03.05.19_multi_TD01, and AC18 V15.03.05.19(6318_)_CN devices. There is a buffer overflow vulnerability in the router's web server -- httpd. While processing the /goform/setcfm funcpara1 parameter for a POST request, a value is directly used in a sprintf to a local variable placed on the stack, which overwrites the return address of a function. An attacker can construct a payload to carry out arbitrary code execution attacks.

NVD Source

Technical Analysis

CVE-2020-13392 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.

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

tendacn8 product(s)
ac6 firmwareac6ac9 firmwareac9ac15 firmwareac15ac18 firmwareac18
Source: NVD CPE · 10 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://joel-malwarebenchmark.github.io
ADVISORYhttps://joel-malwarebenchmark.github.io/blog/2020/04/28/cve-2020-13392-Tenda-vulnerability/
ADVISORYhttps://joel-malwarebenchmark.github.io
ADVISORYhttps://joel-malwarebenchmark.github.io/blog/2020/04/28/cve-2020-13392-Tenda-vulnerability/

All References (4)

→
https://joel-malwarebenchmark.github.ioExploit · Third Party Advisory
→
https://joel-malwarebenchmark.github.io/blog/2020/04/28/cve-2020-13392-Tenda-vulnerability/Exploit · Third Party Advisory
→
https://joel-malwarebenchmark.github.ioExploit · Third Party Advisory
→
https://joel-malwarebenchmark.github.io/blog/2020/04/28/cve-2020-13392-Tenda-vulnerability/Exploit · Third Party Advisory

Quick Facts

CVE IDCVE-2020-13392
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-120
CISA KEVNo
Affected1 vendor(s)
PublishedMay 22, 2020

Related CVEs (CWE-120)

CVE-2022-22570
10.0
CVE-2001-0191
10.0
CVE-2023-4260
10.0
CVE-2022-20827
10.0
CVE-2007-1770
10.0
CVE-2012-10035
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-13392 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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