Buffer overflow in Tenda Ac9
CVE-2021-42659
There is a buffer overflow vulnerability in the Web server httpd of the router in Tenda router devices such as Tenda AC9 V1.0 V15.03.02.19(6318) and Tenda AC9 V3.0 V15.03.06.42_multi. When setting the virtual service, the httpd program will crash and exit when the super-long list parameter occurs.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/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
- Tenda Ac9 — versions 1.0, 3.0
- Tenda Ac9 Firmware — versions 15.03.05.19\(6318\), 15.03.05.19(6318), 15.03.06.42_multi
Weakness classification (CWE)
References
- github.com/Lyc-heng/routers/blob/main/routers/stack4.md (Exploit, Third Party Advisory)
- www.cnvd.org.cn/flaw/show/CNVD-2021-24948 (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-42659?
- CVE-2021-42659 is a medium-severity vulnerability in Tenda Ac9, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.5/10. Published 2022-05-24.
- How severe is CVE-2021-42659?
- Medium severity. CVSS v3 base score is 6.5 out of 10.