CVE-2026-77031: Tenda CH22 formcreateFileName command injection
Vulnerability summary
CVE-2026-77031 is a high (CVSS 7.4) Injection vulnerability in tenda ch22_firmware. EPSS estimates a 2.75% chance of exploitation in the next 30 days, higher than 86% of scored vulnerabilities. 1 public exploit is recorded.
Timeline
- 20-08-2026PublishedVulnerability first disclosed.
- 20-08-2026Last modifiedVulnerability information updated.
Description
A vulnerability has been found in Tenda CH22 1.0.0.1. The affected element is the function formcreateFileName of the file /goform/formcreateFileName. The manipulation of the argument fileNameMit leads to command injection. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.
CVSS metrics
7 scores · 2 sources · 4 versions- NVDNIST2.1LowCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XDiffers
- NVDNIST7.4HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
- NVDNIST6.5MediumAV:N/AC:L/Au:S/C:P/I:P/A:P
EPSS trend
Probability
2.75%
Chance of exploitation in the next 30 days
Percentile
86%
Versus all other CVEs
30-day change
Increase +1.43 pp
From 1.32% on 22-09-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (candle-throne-f75.notion.site)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.
- CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.
Affected systems
Tenda1 product
- ch22_firmware1.0.0.1
1 vendor · 1 product
References
6 links- vuldb.com/cve/CVE-2026-77031Third Party Advisory
- vuldb.com/submit/880667Third Party Advisory
- www.tenda.com.cnProduct