HOMEVULNERABILITIESCVE-2022-40876
CRITICAL

CVE-2022-40876

CWE-787Published: October 27, 2022· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

In Tenda ax1803 v1.0.0.1, the http requests handled by the fromAdvSetMacMtuWan functions, wanSpeed, cloneType, mac, can cause a stack overflow and enable remote code execution (RCE).

NVD Source

Risk Analysis

Tenda ax1803 firmware contains a stack overflow vulnerability triggered by specific HTTP requests, enabling remote code execution. This critical flaw is remotely exploitable and carries a CVSS score of 9.8.

There is no public exploit known, and the vulnerability is not in the CISA KEV list.

Recommended Action

Ensure the device firmware is updated to a version that addresses this stack overflow vulnerability.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2022-40876 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

tenda2 product(s)
ax1803 firmwareax1803
Source: NVD CPE · 2 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://www.cnblogs.com/L0g4n-blog/p/16695155.html
ADVISORYhttps://www.cnblogs.com/L0g4n-blog/p/16704071.html
ADVISORYhttps://www.cnblogs.com/L0g4n-blog/p/16695155.html
ADVISORYhttps://www.cnblogs.com/L0g4n-blog/p/16704071.html

All References (4)

→
https://www.cnblogs.com/L0g4n-blog/p/16695155.htmlExploit · Third Party Advisory
→
https://www.cnblogs.com/L0g4n-blog/p/16704071.htmlExploit · Third Party Advisory
→
https://www.cnblogs.com/L0g4n-blog/p/16695155.htmlExploit · Third Party Advisory
→
https://www.cnblogs.com/L0g4n-blog/p/16704071.htmlExploit · Third Party Advisory

Quick Facts

CVE IDCVE-2022-40876
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-787
CISA KEVNo
Affected1 vendor(s)
PublishedOct 27, 2022

Related CVEs (CWE-787)

CVE-2016-9343
10.0
CVE-2019-5684
10.0
CVE-2026-4746
10.0
CVE-2011-1807
10.0
CVE-2018-17160
10.0
CVE-2020-11897
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2022-40876 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. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2022-40876·NVD