9.8

CVE-2020-10823: draytek vigor2960 Out-of-bounds Write

Modified
Published 26-03-2020Last modified 05-05-2025

Vulnerability summary

CVE-2020-10823 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in draytek vigor2960. EPSS estimates a 4.42% chance of exploitation in the next 30 days, higher than 91.3% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
4.42%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1reference

Timeline

  1. 26-03-2020
    PublishedVulnerability first disclosed.
  2. 05-05-2025
    Last modifiedVulnerability information updated.

Description

A stack-based buffer overflow in /cgi-bin/activate.cgi through var parameter on Draytek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1 allows remote attackers to achieve code execution via a remote HTTP request (issue 1 of 3).

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

4.42%

Chance of exploitation in the next 30 days

Percentile

91%

Versus all other CVEs

30-day change

No change 0.00 pp

From 4.42% on 22-09-2026

22-09-202622-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (slashd.ga)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Draytek3 products

1 vendor · 3 products

References

2 links