CVE-2022-40876: tenda ax1803_firmware Out-of-bounds Write
CVSS: 9.8v3.1CriticalModified
Published 27-10-2022Last modified 07-05-2025
Vulnerability summary
CVE-2022-40876 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in tenda ax1803_firmware. EPSS estimates a 1.95% chance of exploitation in the next 30 days, higher than 80% of scored vulnerabilities. 2 public exploits are recorded.
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)EPSS score
1.95%
0%100%
Low · +0.04 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits2reference
Timeline
- 27-10-2022PublishedVulnerability first disclosed.
- 07-05-2025Last modifiedVulnerability information updated.
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).
CVSS metrics
2 scores · 2 sources · 1 versionCritical 9.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 2 agree
- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
1.95%
Chance of exploitation in the next 30 days
Percentile
80%
Versus all other CVEs
30-day change
+0.04 pp
From 1.91% on 21-09-2026
21-09-202621-10-2026
EPSS score1.95%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
2 foundExploit Reference (cnblogs.com)
Maturity: unknown
Exploit Reference (cnblogs.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Tenda1 product
- ax1803_firmware1.0.0.1
1 vendor · 1 product