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TI-2021-03003 Aliases CVE-2021-4127GHSA-7wp9-fj5q-c4jc

An out of date graphics library (Angle) likely contained vulnerabilities that could…

Priority MEDIUM 44Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 9 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

An out of date graphics library (Angle) likely contained vulnerabilities that could potentially be exploited. This vulnerability affects Thunderbird < 78.9 and Firefox ESR < 78.9.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00945 61st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Thunderbird (Mozilla): 78.9Firefox ESR (Mozilla): 78.9Red Hat: 8 advisoriesRed Hat: 9 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaThunderbirdbefore 78.978.9Patch availableCNA
MozillaFirefox ESRbefore 78.978.9Patch availableCNA
  • Thunderbird VendorMozilla Affected before 78.9 Fixed in 78.9 Patch available CNA
  • Firefox ESR VendorMozilla Affected before 78.9 Fixed in 78.9 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*before 78.9.0VulnerableMozilla
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*before 78.9.0VulnerableMozilla
  • cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 78.9.0 Vulnerable ·Mozilla
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* Versions before 78.9.0 Vulnerable ·Mozilla

Remediation

  • Fix · CNA Thunderbird (Mozilla) Fixed in 78.9
  • Fix · CNA Firefox ESR (Mozilla) Fixed in 78.9

Red Hat 8 advisories

  • RHSA-2021:0992 Released 2021-03-25 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux Client (v. 7) firefox-78.9.0-1.el7_9
    • Red Hat Enterprise Linux Client Optional (v. 7) firefox-78.9.0-1.el7_9
    • Red Hat Enterprise Linux Server (v. 7) firefox-78.9.0-1.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) firefox-78.9.0-1.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) firefox-78.9.0-1.el7_9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) firefox-78.9.0-1.el7_9
  • RHSA-2021:0996 Released 2021-03-25 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux Client (v. 7) thunderbird-78.9.0-3.el7_9
    • Red Hat Enterprise Linux Server Optional (v. 7) thunderbird-78.9.0-3.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) thunderbird-78.9.0-3.el7_9
  • RHSA-2021:0994 Released 2021-03-25 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) thunderbird-78.9.0-3.el8_2
Show 5 more Red Hat advisories
  • RHSA-2021:0989 Released 2021-03-25 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.2) firefox-78.9.0-1.el8_2
  • RHSA-2021:0993 Released 2021-03-25 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream (v. 8) thunderbird-78.9.0-3.el8_3
  • RHSA-2021:0995 Released 2021-03-25 · Red Hat rating Important
    thunderbird security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.1) thunderbird-78.9.0-3.el8_1
  • RHSA-2021:0991 Released 2021-03-25 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream EUS (v. 8.1) firefox-78.9.0-1.el8_1
  • RHSA-2021:0990 Released 2021-03-25 · Red Hat rating Important
    firefox security update
    • Red Hat Enterprise Linux AppStream (v. 8) firefox-78.9.0-1.el8_3

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2021:0990, RHSA-2021:0993
Red Hat Enterprise Linux AppStream EUS (v. 8.1)Fixed RHSA-2021:0991, RHSA-2021:0995
Red Hat Enterprise Linux AppStream EUS (v. 8.2)Fixed RHSA-2021:0989, RHSA-2021:0994
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2021:0992, RHSA-2021:0996
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2021:0992
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2021:0992
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2021:0992, RHSA-2021:0996
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2021:0992, RHSA-2021:0996
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2021:0992

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-4127
  2. 2026-10-03 Alias added: GHSA-7wp9-fj5q-c4jc

References

Exploit 1

Advisory 2

  • TI-2022-15364 Use after free in Mozilla Firefox CVSS 3.1CRITICAL 9.8
  • TI-2022-13633 Out-of-bounds write in Mozilla Thunderbird CVSS 3.1CRITICAL 9.8
  • TI-2021-03015 XML injection in Mozilla Firefox ESR CVSS 3.1CRITICAL 10.0
  • TI-2022-09755 Protection mechanism failure in Mozilla Firefox CVSS 3.1CRITICAL 9.6
  • TI-2022-07009 Protection mechanism failure in Mozilla Firefox CVSS 3.1CRITICAL 9.6
  • TI-2023-18834 Use after free in Mozilla Firefox CVSS 3.1HIGH 8.8
See all 486 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences