Buffer overflow in Draytek Vigor2960
CVE-2020-14993
A stack-based buffer overflow on DrayTek Vigor2960, Vigor3900, and Vigor300B devices before 1.5.1.1 allows remote attackers to execute arbitrary code via the formuserphonenumber parameter in an authusersms action to mainfunction.cgi.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.053 (92.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.053 · newest: 0.053 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/dexterone/Vigor-poc (Exploit, Third Party Advisory)
- www.draytek.com/about/security-advisory (Vendor Advisory)
- www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack…
Frequently asked questions
- What is CVE-2020-14993?
- CVE-2020-14993 is a critical-severity vulnerability in Draytek Vigor2960, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2020-06-23.
- How severe is CVE-2020-14993?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2020-14993 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.