Vulnerability in Trendnet Tew-755ap
CVE-2021-28846
A Format String vulnerablity exists in TRENDnet TEW-755AP 1.11B03, TEW-755AP2KAC 1.11B03, TEW-821DAP2KAC 1.11B03, and TEW-825DAP 1.11B03, which could let a remote malicious user cause a denial of service due to a logic bug at address 0x40dcd0 when calling fprintf with "%s: key len = %d, too long\n" format. The two variables seem to be put in the wrong order. The vulnerability could be triggered by sending the POST request to apply_cgi with a long and unknown key in the request body.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.008 (55.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000
Affected products
- Trendnet Tew-755ap
- Trendnet Tew-755ap2kac
- Trendnet Tew-755ap2kac Firmware — versions 1.11b03
- Trendnet Tew-755ap Firmware — versions 1.11b03
- Trendnet Tew-821dap2kac
- Trendnet Tew-821dap2kac Firmware — versions 1.11b03
- Trendnet Tew-825dap
- Trendnet Tew-825dap Firmware — versions 1.11b03
Weakness classification (CWE)
References
- github.com/zyw-200/EQUAFL/blob/main/TRENDnet ticket.pdf (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-28846?
- CVE-2021-28846 is a medium-severity vulnerability in Trendnet Tew-755ap, classified under Use of Externally-Controlled Format String. CVSS score: 6.5/10. Published 2021-08-10.
- How severe is CVE-2021-28846?
- Medium severity. CVSS v3 base score is 6.5 out of 10.