A use-after-free vulnerability in SVG Animation has been discovered. An exploit built on this vulnerability has been discovered in the wild targeting Firefox and Tor Browser users on Windows. This vulnerability affects Firefox < 50.0.2, Firefox ESR < 45.5.1, and Thunderbird < 45.5.1.
CVE-2016-9079
“▲” beside the score: it is higher than NVD's CVSS score.
Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2023-06-22), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 7.5 retained for reference. The 9.0 is the floor for confirmed exploitation, not an impact rating: this CVE's impact severity (EG Severity) is CVSS 7.5 HIGH under GitHub Security Advisory CVSS. Confidence: HIGH.
Also known asEUVD-2016-9900 (ENISA EUVD) · GHSA-cmgc-v5fc-wx68 (GitHub Security Advisories)Source: ENISA EUVD
- Actively exploited in the wild (CISA-KEV) — the reason this is sooner than the SSVC decision on this page at low or medium mission impact
A fix is available — apply it.
- CVSS v3
- 7.5
- EG Score
- 9.0CRITICALhigh confidence
- EG Risk
- 89EG Risk 89/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity75% × 45%Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation100% × 40%Fixed at 100% for a CISA KEV listing: EchelonGraph's rule.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Attend at low or medium mission impact; Act at high (mission-essential systems).Exploitation active (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it sooner than your standard update timelines at low or medium mission impact and as soon as possible at high. - EPSS PROB
- 87%
- EPSS %ILE
- 99th
- KEV
- ⚠ Exploited
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (9.0): severity, escalated by confirmed exploitation. This CVE's 9.0 is the CISA KEV floor for confirmed exploitation, not an impact rating: its impact severity (EG Severity) is CVSS 7.5 HIGH.
- EG Severity
- 7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 87% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- CISA KEV and EG-KEV Tier 1 (exploited in the wild)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Attend at medium mission impactAttend at low or medium mission impact; Act at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 14 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Attend at low or medium mission impact; Act at high (mission-essential systems).
A fix is available. Apply it sooner than your standard update timelines at low or medium mission impact and as soon as possible at high.
Exploitation active (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 14 days if it is not.
The score's inputs: In CISA KEV yes (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
CISA required action“Apply updates per vendor instructions.”
Quoted verbatim from CISA's Known Exploited Vulnerabilities catalog. CISA directs it at US federal civilian executive branch agencies under Binding Operational Directive (BOD) 26-04, which replaced BOD 22-01 on 10 June 2026; it is not EchelonGraph's advice. CISA's notes: https://www.mozilla.org/en-US/security/advisories/mfsa2016-92/#CVE-2016-9079 · https://nvd.nist.gov/vuln/detail/CVE-2016-9079
Published
June 11, 2018
Last Modified
November 4, 2025
Advisory Details (10)
Auto-updated Oct 27, 2026Firefox 50.0.1 - ASM.JS JIT-Spray Remote Code Execution - Windows remote Exploit
https://www.exploit-db.com/exploits/42327/Mozilla Firefox < 50.0.2 - 'nsSMILTimeContainer::NotifyTimeChange()' Remote Code Execution (Metasploit) - Windows remote Exploit
https://www.exploit-db.com/exploits/41151/[SECURITY] [DSA 3730-1] icedove security update
https://www.debian.org/security/2016/dsa-3730Mozilla SeaMonkey: Multiple vulnerabilities (GLSA 201701-35) — Gentoo security
https://security.gentoo.org/glsa/201701-35Mozilla Firefox, Thunderbird: Multiple vulnerabilities (GLSA 201701-15) — Gentoo security
https://security.gentoo.org/glsa/201701-151321066 - (CVE-2016-9079) Reported Firefox SVG 0-day (Iterator invalidation in nsSMILTimeContainer::NotifyTimeChange())
https://bugzilla.mozilla.org/show_bug.cgi?id=1321066Patch Availability(4)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| ubuntu | firefox (50.0.2+build1-0ubuntu0.16.10.1) @ yakkety | 2026-11-02 | ubuntu |
| ubuntu | thunderbird (1:45.5.1+build1-0ubuntu0.12.04.1) @ precise | 2026-11-02 | ubuntu |
| redhat | thunderbird-0:45.5.1-1.el7_3 | 2016-12-05 | redhat |
| redhat | firefox-0:45.5.1-1.el7_3 | 2016-12-01 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(8 across 6 ecosystems)
Debian:7(2)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| firefox-esr | 45.0.1esr-1 ... 45.5.0esr-1~deb8u1 (21 versions) |
| — |
| icedove | 10.0.12-1 ... 44.0~b1-1 (121 versions) |
| — |
Debian:8(2)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| firefox-esr | 45.0.1esr-1 ... 45.5.1esr-1~deb7u1 (22 versions) |
| — |
| icedove | 1:45.0~b4-1 ... 44.0~b1-1 (68 versions) |
| — |
Debian:11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| firefox-esr | — |
| — |
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| firefox-esr | — |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| firefox-esr | — |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| firefox-esr | — |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
All Vendor Advisories
(4)
Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
Data Freshness Timeline
(refreshed 24× in last 7d / 199× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 100 of 1,948 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 1,848 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-02 12:55 UTCOSV refresh
- 2026-11-02 04:51 UTCEG score recompute
- 2026-11-02 04:51 UTCVendor advisory
- 2026-11-02 04:51 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-11-01 05:59 UTCEG score recompute
- 2026-11-01 05:59 UTCVendor advisory
- 2026-11-01 05:59 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-31 07:06 UTCEG score recompute
- 2026-10-31 07:06 UTCVendor advisory
- 2026-10-31 07:06 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-30 16:27 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-10-30 08:11 UTCEG score recompute
- 2026-10-30 08:11 UTCVendor advisory
- 2026-10-30 08:11 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-29 09:18 UTCEG score recompute
- 2026-10-29 09:18 UTCVendor advisory
- 2026-10-29 09:18 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-28 10:26 UTCEG score recompute
- 2026-10-28 10:26 UTCVendor advisory
- 2026-10-28 10:25 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-27 16:26 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-10-27 11:33 UTCEG score recompute
- 2026-10-27 11:33 UTCVendor advisory
- 2026-10-27 11:33 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-26 12:40 UTCEG score recompute
Show 75 moreShow fewer
- 2026-10-26 12:40 UTCVendor advisory
- 2026-10-26 12:40 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-25 16:27 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-10-25 13:47 UTCEG score recompute
- 2026-10-25 13:47 UTCVendor advisory
- 2026-10-25 13:47 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-24 14:53 UTCEG score recompute
- 2026-10-24 14:53 UTCVendor advisory
- 2026-10-24 14:53 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-23 16:26 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-10-23 16:00 UTCVendor advisory
- 2026-10-23 16:00 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-22 17:06 UTCEG score recompute
- 2026-10-22 17:06 UTCVendor advisory
- 2026-10-22 17:05 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-22 16:27 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-10-21 18:12 UTCEG score recompute
- 2026-10-21 18:12 UTCVendor advisory
- 2026-10-21 18:12 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-21 16:27 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-10-20 19:18 UTCEG score recompute
- 2026-10-20 19:18 UTCVendor advisory
- 2026-10-20 19:18 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-19 20:25 UTCEG score recompute
- 2026-10-19 20:25 UTCVendor advisory
- 2026-10-19 20:25 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-19 16:26 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-10-18 21:33 UTCEG score recompute
- 2026-10-18 21:33 UTCVendor advisory
- 2026-10-18 21:33 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-18 16:26 UTCEPSS rescoreEPSS 87% · 99th percentile
- 2026-10-18 10:45 UTCEG score recompute
- 2026-10-17 22:39 UTCEG score recompute
- 2026-10-17 22:39 UTCVendor advisory
- 2026-10-17 22:39 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-16 23:45 UTCEG score recompute
- 2026-10-16 23:45 UTCVendor advisory
- 2026-10-16 23:45 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-16 00:52 UTCEG score recompute
- 2026-10-16 00:52 UTCVendor advisory
- 2026-10-16 00:52 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-15 16:26 UTCEPSS rescoreEPSS 88% · 99th percentile
- 2026-10-15 01:59 UTCEG score recompute
- 2026-10-15 01:59 UTCVendor advisory
- 2026-10-15 01:59 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-14 16:27 UTCEPSS rescoreEPSS 88% · 99th percentile
- 2026-10-14 03:07 UTCEG score recompute
- 2026-10-14 03:07 UTCVendor advisory
- 2026-10-14 03:06 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-13 04:13 UTCVendor advisory
- 2026-10-13 04:13 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-12 20:39 UTCEG score recompute
- 2026-10-12 05:18 UTCVendor advisory
- 2026-10-12 05:18 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-12 01:36 UTCVendor advisory
- 2026-10-12 01:36 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-11 21:56 UTCEG score recompute
- 2026-10-11 21:56 UTCVendor advisory
- 2026-10-11 21:56 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-11 18:17 UTCEG score recompute
- 2026-10-11 18:17 UTCVendor advisory
- 2026-10-11 18:16 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-11 14:34 UTCEG score recompute
- 2026-10-11 14:34 UTCVendor advisory
- 2026-10-11 14:34 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-11 10:54 UTCVendor advisory
- 2026-10-11 10:54 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-11 07:13 UTCVendor advisory
- 2026-10-11 07:13 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-11 03:33 UTCVendor advisory
- 2026-10-11 03:33 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-10 23:52 UTCVendor advisory
- 2026-10-10 23:52 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-10 20:13 UTCVendor advisory
- 2026-10-10 20:13 UTCGHSA enrichmentGHSA-cmgc-v5fc-wx68 · GitHub severity HIGH · GitHub CVSS 7.5
Publicly available exploits
(4 references)Public exploit code is referenced for this CVE (1 Metasploit module, 2 Exploit-DB entries, 1 GitHub PoC). Defenders should treat patch urgency accordingly.
- Exploit-DBEDB-41151✓ verifiedPublished Jan 24, 2017
Mozilla Firefox < 50.0.2 - 'nsSMILTimeContainer::NotifyTimeChange()' Remote Code Execution (Metasploit)
Open source ↗ - Metasploitexploit/windows/browser/firefox_smil_uaf✓ verifiedPublished Jan 23, 2017
Firefox nsSMILTimeContainer::NotifyTimeChange() RCE
Open source ↗ - GitHub PoCdangokyo/CVE-2016-9079Published Jul 29, 2018
A demo exploit of CVE-2016-9079 on Ubuntu x64
Open source ↗ - Exploit-DBEDB-42327Published Jul 14, 2017
Firefox 50.0.1 - ASM.JS JIT-Spray Remote Code Execution
Open source ↗
Related CVEs(same product + same vendor + same CWE)
Same product
10 shownDebian:8:icedove
Same vendor
6 shownubuntu:USN-3141-1 · ubuntu:USN-3140-1
Same CWE
10 shownCWE-416
Frequently asked(6)
What is CVE-2016-9079?
When was CVE-2016-9079 made public?
Is CVE-2016-9079 actively exploited?
What is the CVSS score of CVE-2016-9079?
Which products are affected by CVE-2016-9079?
How do I remediate CVE-2016-9079?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2016-9079
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