6.5

CVE-2020-26977: mozilla firefox

CVSS: 6.5v3.1MediumModified
Published 07-01-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-26977 is a medium (CVSS 6.5) vulnerability in mozilla firefox. EPSS estimates a 0.87% chance of exploitation in the next 30 days, higher than 58% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.87%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
OPENSUSE-SU-2024:10600-1OPENSUSE-SU-2024:14572-1

Timeline

  1. 07-01-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

By attempting to connect a website using an unresponsive port, an attacker could have controlled the content of a tab while the URL bar displayed the original domain. *Note: This issue only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 84.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

0.87%

Chance of exploitation in the next 30 days

Percentile

58%

Versus all other CVEs

30-day change

+0.02 pp

From 0.85% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.87%

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

No weakness data has been published for this record.

Affected systems

Mozilla2 products

1 vendor · 2 products

References

2 links