VulnerabilityAnalyzed

CVE-2026-5021

This manipulation of the argument delno causes stack-based buffer overflow.

HIGH 7.4EPSS 0.63%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.63%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

A flaw has been found in Tenda F453 1.0.0.3. This affects the function fromPPTPUserSetting of the file /goform/PPTPUserSetting of the component httpd. This manipulation of the argument delno causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been published and may be used.

CVSS 4.0: 7.4 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.63% probability · 48th percentile
CISA KEV: Not listed
Weakness: CWE-119, CWE-121, CWE-787
Affected: tenda/f453 firmware
Source: cna@vuldb.com

References

https://github.com/Litengzheng/vul_db/blob/main/F453/vul_92/README.mdExploit, Third Party Advisory
https://vuldb.com/submit/778415Third Party Advisory, VDB Entry
https://vuldb.com/vuln/353906Third Party Advisory, VDB Entry
https://vuldb.com/vuln/353906/ctiPermissions Required, VDB Entry
https://www.tenda.com.cn/Product

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.