CVE-2020-20746: tendacn ac9_firmware Out-of-bounds Write
CVSS: 7.2v3.1HighModified
Published 30-09-2021Last modified 04-08-2024
Vulnerability summary
CVE-2020-20746 is a high (CVSS 7.2) Out-of-bounds Write vulnerability in tendacn ac9_firmware. EPSS estimates a 2.90% chance of exploitation in the next 30 days, higher than 86.8% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.2/10
010
High · v3.1 (NVD)EPSS score
2.90%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Timeline
- 30-09-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A stack-based buffer overflow in the httpd server on Tenda AC9 V15.03.06.60_EN allows remote attackers to execute arbitrary code or cause a denial of service (DoS) via a crafted POST request to /goform/SetStaticRouteCfg.
CVSS metrics
2 scores · 1 source · 2 versionsHigh 7.2Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HSourcesSingle source
Medium 6.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:S/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
2.90%
Chance of exploitation in the next 30 days
Percentile
87%
Versus all other CVEs
30-day change
0.00 pp
From 2.90% on 22-09-2026
22-09-202622-10-2026
EPSS score2.90%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundVulinfo
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Tendacn1 product
- ac9_firmware15.03.06.60_en
1 vendor · 1 product
References
2 links- github.com/grapefruitvul/vulinfo/blob/master/tenda/vul1.mdX Refsource MISCExploitThird Party Advisory