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.

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

EPSS: 0.053 (91.6th percentile) — read the EPSS interpretation.

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.

Affected products

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (x_refsource_MISC, Vendor Advisory)
cve@mitre.org (x_refsource_CONFIRM)

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.