CVE-2016-5290
Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.21%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Memory safety bugs were reported in Firefox 49 and Firefox ESR 45.4. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Thunderbird < 45.5, Firefox ESR < 45.5, and Firefox < 50.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.21% probability · 88th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- mozilla/firefox · mozilla/thunderbird · debian/debian linux
- Source
- security@mozilla.org
EPSS 3.2% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://rhn.redhat.com/errata/RHSA-2016-2780.htmlThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-2825.htmlThird Party Advisory
- http://www.securityfocus.com/bid/94335Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037298Third Party Advisory, VDB Entry
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1309720%2C1297062%2C1303710%2C1018486%2C1292590%2C1301343%2C1301496%2C1308048%2C1308346%2C1299519%2C1286911%2C1298169Vendor Advisory
- https://security.gentoo.org/glsa/201701-15Third Party Advisory
- https://www.debian.org/security/2016/dsa-3730Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2016-89/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2016-90/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2016-93/Vendor Advisory
- http://rhn.redhat.com/errata/RHSA-2016-2780.htmlThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-2825.htmlThird Party Advisory
- http://www.securityfocus.com/bid/94335Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037298Third Party Advisory, VDB Entry
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1309720%2C1297062%2C1303710%2C1018486%2C1292590%2C1301343%2C1301496%2C1308048%2C1308346%2C1299519%2C1286911%2C1298169Vendor Advisory
- https://security.gentoo.org/glsa/201701-15Third Party Advisory
- https://www.debian.org/security/2016/dsa-3730Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2016-89/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2016-90/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2016-93/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.