# Thunderbird vulnerabilities

> Thunderbird is made by Mozilla. We track 1,544 published vulnerabilities listed under that exact name, across 432 versions. 14 of them are on the list of flaws known to be exploited, the newest added on 6 October 2025. Mozilla lists newer releases under their own names, such as Thunderbird Esr, so check those pages too.

Canonical page: https://www.precursorintelligence.com/product/mozilla/thunderbird

## At a glance

- **Made by:** [Mozilla](https://www.precursorintelligence.com/vendors/mozilla)
- **Published vulnerabilities:** 1,544
- **Known to be exploited:** 14 (listed under the name Thunderbird)
- **Versions tracked:** 432
- **Most recently added to the known-exploited list:** [CVE-2010-3765](https://www.precursorintelligence.com/what-is/cve-2010-3765), 6 October 2025. We keep watching the list.

## Is Thunderbird listed under other names?

Mozilla also lists Thunderbird under more specific names, such as Thunderbird Esr. Flaws listed only under those names are counted on their own pages, not here.

- [Thunderbird Esr](https://www.precursorintelligence.com/product/mozilla/thunderbird_esr): 228 published vulnerabilities

## Which versions of Thunderbird do the exploited flaws hit?

Each exploited flaw lists the versions it affects, as published. "before 115.16.0" means every version up to, but not including, 115.16.0.

- [CVE-2010-3765](https://www.precursorintelligence.com/what-is/cve-2010-3765) (Mozilla Multiple Products Remote Code Execution Vulnerability): 3.0.1, 3.0.2, 3.0.3, 3.0.4, 3.0.5, 3.0.6, 3.0.7, 3.0.8, 3.0.9, 3.1.1, 3.1.2, 3.1.3, 3.1.4, 3.1.5
- [CVE-2024-9680](https://www.precursorintelligence.com/what-is/cve-2024-9680) (Mozilla Firefox Use-After-Free Vulnerability): before 115.16.0, 128.0.1 to before 128.3.1, 131.0
- [CVE-2023-5217](https://www.precursorintelligence.com/what-is/cve-2023-5217) (Google Chromium libvpx Heap Buffer Overflow Vulnerability): before 115.3.1
- [CVE-2023-4863](https://www.precursorintelligence.com/what-is/cve-2023-4863) (Google Chromium WebP Heap-Based Buffer Overflow Vulnerability): before 102.15.1, 115.0 to before 115.2.2
- [CVE-2016-9079](https://www.precursorintelligence.com/what-is/cve-2016-9079) (Mozilla Firefox, Firefox ESR, and Thunderbird Use-After-Free Vulnerability): before 45.5.1
- [CVE-2019-11707](https://www.precursorintelligence.com/what-is/cve-2019-11707) (Mozilla Firefox and Thunderbird Type Confusion Vulnerability): before 60.7.2
- [CVE-2019-11708](https://www.precursorintelligence.com/what-is/cve-2019-11708) (Mozilla Firefox and Thunderbird Sandbox Escape Vulnerability): before 60.7.2
- [CVE-2013-1690](https://www.precursorintelligence.com/what-is/cve-2013-1690) (Mozilla Firefox and Thunderbird Denial-of-Service Vulnerability): before 17.0.7
- [CVE-2022-26485](https://www.precursorintelligence.com/what-is/cve-2022-26485) (Mozilla Firefox Use-After-Free Vulnerability): before 91.6.2
- [CVE-2022-26486](https://www.precursorintelligence.com/what-is/cve-2022-26486) (Mozilla Firefox Use-After-Free Vulnerability): before 91.6.2
- [CVE-2013-1675](https://www.precursorintelligence.com/what-is/cve-2013-1675) (Mozilla Firefox Information Disclosure Vulnerability): before 17.0.6
- [CVE-2020-6820](https://www.precursorintelligence.com/what-is/cve-2020-6820) (Mozilla Firefox And Thunderbird Use-After-Free Vulnerability): before 68.7.0
- [CVE-2020-6819](https://www.precursorintelligence.com/what-is/cve-2020-6819) (Mozilla Firefox And Thunderbird Use-After-Free Vulnerability): before 68.7.0
- [CVE-2019-17026](https://www.precursorintelligence.com/what-is/cve-2019-17026) (Mozilla Firefox And Thunderbird Type Confusion Vulnerability): before 68.4.1

## Which Thunderbird vulnerabilities are being exploited?

14 flaws are on the government list of vulnerabilities known to be exploited, newest first:

- [CVE-2010-3765](https://www.precursorintelligence.com/what-is/cve-2010-3765): Mozilla Multiple Products Remote Code Execution Vulnerability. Critical, CVSS 9.8, chance of use in 30 days 83%, known exploited since 6 October 2025.
- [CVE-2024-9680](https://www.precursorintelligence.com/what-is/cve-2024-9680): Mozilla Firefox Use-After-Free Vulnerability. Critical, CVSS 9.8, chance of use in 30 days 23%, known exploited since 15 October 2024.
- [CVE-2023-5217](https://www.precursorintelligence.com/what-is/cve-2023-5217): Google Chromium libvpx Heap Buffer Overflow Vulnerability. High, CVSS 8.8, chance of use in 30 days 49%, known exploited since 2 October 2023.
- [CVE-2023-4863](https://www.precursorintelligence.com/what-is/cve-2023-4863): Google Chromium WebP Heap-Based Buffer Overflow Vulnerability. High, CVSS 8.8, chance of use in 30 days >99%, known exploited since 13 September 2023.
- [CVE-2016-9079](https://www.precursorintelligence.com/what-is/cve-2016-9079): Mozilla Firefox, Firefox ESR, and Thunderbird Use-After-Free Vulnerability. High, CVSS 7.5, chance of use in 30 days 88%, known exploited since 22 June 2023.
- [CVE-2019-11707](https://www.precursorintelligence.com/what-is/cve-2019-11707): Mozilla Firefox and Thunderbird Type Confusion Vulnerability. High, CVSS 8.8, chance of use in 30 days 38%, known exploited since 23 May 2022.
- [CVE-2019-11708](https://www.precursorintelligence.com/what-is/cve-2019-11708): Mozilla Firefox and Thunderbird Sandbox Escape Vulnerability. Critical, CVSS 10.0, chance of use in 30 days 56%, known exploited since 23 May 2022.
- [CVE-2013-1690](https://www.precursorintelligence.com/what-is/cve-2013-1690): Mozilla Firefox and Thunderbird Denial-of-Service Vulnerability. High, CVSS 8.8, chance of use in 30 days 69%, known exploited since 28 March 2022.
- [CVE-2022-26485](https://www.precursorintelligence.com/what-is/cve-2022-26485): Mozilla Firefox Use-After-Free Vulnerability. High, CVSS 8.8, chance of use in 30 days 14%, known exploited since 7 March 2022.
- [CVE-2022-26486](https://www.precursorintelligence.com/what-is/cve-2022-26486): Mozilla Firefox Use-After-Free Vulnerability. Critical, CVSS 9.6, chance of use in 30 days 2.4%, known exploited since 7 March 2022.
- [CVE-2013-1675](https://www.precursorintelligence.com/what-is/cve-2013-1675): Mozilla Firefox Information Disclosure Vulnerability. Medium, CVSS 6.5, chance of use in 30 days 6.7%, known exploited since 3 March 2022.
- [CVE-2020-6820](https://www.precursorintelligence.com/what-is/cve-2020-6820): Mozilla Firefox And Thunderbird Use-After-Free Vulnerability. High, CVSS 8.1, chance of use in 30 days 7.1%, known exploited since 3 November 2021.
- [CVE-2020-6819](https://www.precursorintelligence.com/what-is/cve-2020-6819): Mozilla Firefox And Thunderbird Use-After-Free Vulnerability. High, CVSS 8.1, chance of use in 30 days 3.0%, known exploited since 3 November 2021.
- [CVE-2019-17026](https://www.precursorintelligence.com/what-is/cve-2019-17026): Mozilla Firefox And Thunderbird Type Confusion Vulnerability. High, CVSS 8.8, chance of use in 30 days 46%, known exploited since 3 November 2021.

## Which Thunderbird flaws are most likely to be used?

Ranked by the latest exploit-likelihood forecast (the chance each flaw is used in an attack in the next 30 days):

- [CVE-2015-4000](https://www.precursorintelligence.com/what-is/cve-2015-4000): >99%, Low (CVSS 3.7)
- [CVE-2016-9079](https://www.precursorintelligence.com/what-is/cve-2016-9079): 88%, High (CVSS 7.5), known exploited
- [CVE-2013-2566](https://www.precursorintelligence.com/what-is/cve-2013-2566): 84%, Medium (CVSS 5.9)
- [CVE-2014-1511](https://www.precursorintelligence.com/what-is/cve-2014-1511): 84%, Critical (CVSS 9.8)
- [CVE-2010-3765](https://www.precursorintelligence.com/what-is/cve-2010-3765): 83%, Critical (CVSS 9.8), known exploited
- [CVE-2014-1510](https://www.precursorintelligence.com/what-is/cve-2014-1510): 82%, Critical (CVSS 9.8)
- [CVE-2011-2371](https://www.precursorintelligence.com/what-is/cve-2011-2371): 76%, Critical (CVSS 10.0)
- [CVE-2013-0758](https://www.precursorintelligence.com/what-is/cve-2013-0758): 73%, Critical (CVSS 9.3)
- [CVE-2006-0295](https://www.precursorintelligence.com/what-is/cve-2006-0295): 71%, Medium (CVSS 5.1)
- [CVE-2011-3658](https://www.precursorintelligence.com/what-is/cve-2011-3658): 70%, High (CVSS 7.5)

## Questions

### How many vulnerabilities does Thunderbird have?

We track 1,544 published vulnerabilities listed under the name Thunderbird, across 432 versions. The most recent Thunderbird flaw added to the known-exploited list is CVE-2010-3765, on 6 October 2025.

### Which Thunderbird vulnerabilities are being exploited?

14 are on the list of flaws known to be exploited. The most recently added are CVE-2010-3765, CVE-2024-9680 and CVE-2023-5217.

### Why are newer Thunderbird flaws missing from this page?

Mozilla also lists Thunderbird under more specific names, such as Thunderbird Esr. Flaws listed only under those names are counted on their own pages, not here. Open the release you run to see its own list.

### Which versions of Thunderbird do the exploited flaws affect?

Each flaw names its own versions, usually as ranges. The newest, CVE-2010-3765, affects 3.0.1, 3.0.2, 3.0.3, 3.0.4 and more. The versions for every exploited flaw are listed on this page.

### How do I get alerts for Thunderbird?

Create a Precursor Intelligence account and track Thunderbird. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook.

## Running Thunderbird?

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- **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it.
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