9.8

CVE-2021-39306: realtek rtl8195am_firmware Out-of-bounds Write

CVSS: 9.8v3.1CriticalModified
Published 22-12-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2021-39306 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in realtek rtl8195am_firmware. EPSS estimates a 1.31% chance of exploitation in the next 30 days, higher than 70.1% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
1.31%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 22-12-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

A stack buffer overflow was discovered on Realtek RTL8195AM device before 2.0.10, it exists in the client code when an attacker sends a big size Authentication challenge text in WEP security.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

1.31%

Chance of exploitation in the next 30 days

Percentile

70%

Versus all other CVEs

30-day change

+0.04 pp

From 1.26% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.31%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Realtek1 product

1 vendor · 1 product

References

2 links