Known vulnerabilities in Firefox ESR

Vendor: Mozilla
Software: Firefox ESR
Software CPE: cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
Total vulnerabilities: 998
Public exploits: 30
Known exploited (KEV): 13
Highest CVSSv4 Score: 9.3

Breakdown by Severity Chart

Severity distribution of vulnerabilities affecting Firefox ESR Firefox ESR is affected by 998 known vulnerabilities: 11 critical, 508 high, 266 medium, 213 low Critical High Medium Low

Vulnerabilities (998)

Vulnerability CWE-ID CSH Severity Public Exploit KEV First fixed release Published Bulletins
#VU138977 - Use After Free
CVE-2026-16362
CWE-416 High
No
No
140.13.0 21.07.2026 SB2026072201
SB2026072301
SB2026072302
and 12 more
#VU138978 - Incorrect Calculation
CVE-2026-16363
CWE-682 High
No
No
140.13.0 21.07.2026 SB2026072201
SB2026072301
SB2026072302
and 12 more
#VU138979 - Out-of-bounds read
CVE-2026-16368
CWE-125 Medium
No
No
140.13.0 21.07.2026 SB2026072201
SB2026072301
SB2026072302
and 12 more
#VU138980 - Integer overflow
CVE-2026-16369
CWE-190 High
No
No
140.13.0 21.07.2026 SB2026072201
SB2026072301
SB2026072302
and 12 more
#VU138981 - Improper Privilege Management
CVE-2026-16371
CWE-269 High
No
No
140.13.0 21.07.2026 SB2026072201
SB2026072301
SB2026072302
and 12 more
#VU138982 - Exposure of sensitive information to an unauthorized actor
CVE-2026-16374
CWE-200 Medium
No
No
140.13.0 21.07.2026 SB2026072201
SB2026072301
SB2026072302
and 12 more
#VU138983 - Protection Mechanism Failure
CVE-2026-16375
CWE-693 High
No
No
140.13.0 21.07.2026 SB2026072201
SB2026072301
SB2026072302
and 12 more
#VU138964 - Improper Access Control
CVE-2026-16349
CWE-284 Medium
No
No
115.38.0, 140.13.0 21.07.2026 SB2026072201
SB2026072301
SB2026072302
and 12 more
#VU138965 - Improper input validation
CVE-2026-16350
CWE-20 Medium
No
No
115.38.0, 140.13.0 21.07.2026 SB2026072201
SB2026072301
SB2026072302
and 12 more
#VU138966 - Use After Free
CVE-2026-16351
CWE-416 High
No
No
115.38.0, 140.13.0 21.07.2026 SB2026072201
SB2026072301
SB2026072302
and 12 more
#VU138967 - Use After Free
CVE-2026-16352
CWE-416 High
No
No
115.38.0, 140.13.0 21.07.2026 SB2026072201
SB2026072301
SB2026072302
and 12 more
#VU138968 - NULL Pointer Dereference
CVE-2026-16353
CWE-476 Medium
No
No
115.38.0, 140.13.0 21.07.2026 SB2026072201
SB2026072301
SB2026072302
and 12 more
#VU138969 - Exposure of sensitive information to an unauthorized actor
CVE-2026-16354
CWE-200 Medium
No
No
115.38.0, 140.13.0 21.07.2026 SB2026072201
SB2026072301
SB2026072302
and 12 more
#VU138970 - Incorrect Calculation
CVE-2026-16355
CWE-682 High
No
No
115.38.0, 140.13.0 21.07.2026 SB2026072201
SB2026072301
SB2026072302
and 12 more
#VU138971 - Use After Free
CVE-2026-16356
CWE-416 High
No
No
115.38.0, 140.13.0 21.07.2026 SB2026072201
SB2026072301
SB2026072302
and 12 more
#VU138972 - Improper input validation
CVE-2026-16357
CWE-20 Medium
No
No
115.38.0, 140.13.0 21.07.2026 SB2026072201
SB2026072301
SB2026072302
and 12 more
#VU138973 - Improper Access Control
CVE-2026-16358
CWE-284 Medium
No
No
115.38.0, 140.13.0 21.07.2026 SB2026072201
SB2026072301
SB2026072302
and 12 more
#VU138974 - Improper input validation
CVE-2026-16359
CWE-20 Medium
No
No
115.38.0, 140.13.0 21.07.2026 SB2026072201
SB2026072301
SB2026072302
and 12 more
#VU138975 - Memory corruption
CVE-2026-16360
CWE-119 High
No
No
115.38.0, 140.13.0 21.07.2026 SB2026072201
SB2026072301
SB2026072302
and 12 more
#VU138976 - Memory corruption
CVE-2026-16361
CWE-119 High
No
No
115.38.0, 140.13.0 21.07.2026 SB2026072201
SB2026072301
SB2026072442
and 11 more


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