NVD / CVE Program· CNA mozilla

CVE-2016-9079: A use-after-free vulnerability in SVG Animation has been discovered.

HighCVSS 7.5 · v3.1KEVWeaponized Fix available

Noroxi assessment

Priority: Now (action score 86/100)

CISA has confirmed exploitation in the wild (Jun 22, 2023). Remediation deadline for US federal agencies: Jul 13, 2023.
A ready-made attack module is public (Metasploit); exploiting it takes no special expertise.
Probability of exploitation in the next 30 days: 87.3% (FIRST EPSS); higher than 99.7% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
Fixed version: firefox-esr (Debian:12) 45.5.1esr-1; firefox-esr (Debian:7) 45.5.1esr-1~deb7u1; icedove (Debian:7) 1:45.5.1-1~deb7u1.

Patch today or shut off access. Upgrade to firefox-esr (Debian:12) 45.5.1esr-1; firefox-esr (Debian:7) 45.5.1esr-1~deb7u1; icedove (Debian:7) 1:45.5.1-1~deb7u1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

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.

Published: Jun 11, 2018
Updated: Jun 16, 2026
EPSS: 87.3% · 99th percentile
CWE: CWE-416

Report tools

JSON

Action score

Now

Patch today or shut off access.

CVSS: 30 / 40 · 7.5 / 10
CISA KEV: 30 / 30 · Listed
EPSS: 26 / 30 · 87.3%

CISA SSVC decision

Exploitation: active
Automatable: yes
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Jun 22, 2023. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Jul 13, 2023.

Get told when this record changes

In CISA KEV: exploitation in the wild confirmed
Weaponized exploit exists
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
debian	debian linux	cpe:2.3:o:debian:debian_linux
redhat	enterprise linux server eus	cpe:2.3:o:redhat:enterprise_linux_server_eus
redhat	enterprise linux	cpe:2.3:o:redhat:enterprise_linux
redhat	enterprise linux desktop	cpe:2.3:o:redhat:enterprise_linux_desktop
redhat	enterprise linux server	cpe:2.3:o:redhat:enterprise_linux_server
redhat	enterprise linux server aus	cpe:2.3:o:redhat:enterprise_linux_server_aus
redhat	enterprise linux workstation	cpe:2.3:o:redhat:enterprise_linux_workstation
mozilla	thunderbird	cpe:2.3:a:mozilla:thunderbird
microsoft	windows	cpe:2.3:o:microsoft:windows
mozilla	firefox	cpe:2.3:a:mozilla:firefox
torproject	tor	cpe:2.3:a:torproject:tor

Versions reported by the vendor

Affected version ranges reported by the assigning authority (mozilla). Independent of NVD's CPE analysis and usually ahead of it.

Mozilla Firefox
- unspecified and later · before 50.0.2affected
Mozilla Firefox ESR
- unspecified and later · before 45.5.1affected
Mozilla Thunderbird
- unspecified and later · before 45.5.1affected

Affected versions · NVD (20)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

debian debian linux9.0
mozilla firefoxbefore 50.0.2
mozilla firefoxbefore 45.5.1
mozilla thunderbirdbefore 45.5.1
redhat enterprise linux5.0
redhat enterprise linux6.0
redhat enterprise linux7.0
redhat enterprise linux desktop5.0
redhat enterprise linux desktop6.0
redhat enterprise linux desktop7.0
redhat enterprise linux server5.0
redhat enterprise linux server6.0
redhat enterprise linux server7.0
redhat enterprise linux server aus7.3
redhat enterprise linux server aus7.4
redhat enterprise linux server eus7.3
redhat enterprise linux server eus7.4
redhat enterprise linux server eus7.5
redhat enterprise linux workstation5.0
redhat enterprise linux workstation6.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	firefox-esr	before 45.5.1esr-1	45.5.1esr-1
Debian:7	firefox-esr	before 45.5.1esr-1~deb7u1	45.5.1esr-1~deb7u1
Debian:7	icedove	before 1:45.5.1-1~deb7u1	1:45.5.1-1~deb7u1
Debian:8	firefox-esr	before 45.5.1esr-1~deb8u1	45.5.1esr-1~deb8u1
Debian:8	icedove	before 1:45.5.1-1~deb8u1	1:45.5.1-1~deb8u1
Red Hat:enterprise_linux:5::client	firefox	before 0:45.5.1-1.el5_11	0:45.5.1-1.el5_11
Red Hat:enterprise_linux:5::client	firefox-debuginfo	before 0:45.5.1-1.el5_11	0:45.5.1-1.el5_11
Red Hat:enterprise_linux:5::client	thunderbird	before 0:45.5.1-1.el5_11	0:45.5.1-1.el5_11
Red Hat:enterprise_linux:5::client	thunderbird-debuginfo	before 0:45.5.1-1.el5_11	0:45.5.1-1.el5_11
Red Hat:enterprise_linux:6::client	firefox	before 0:45.5.1-1.el6_8	0:45.5.1-1.el6_8
Red Hat:enterprise_linux:6::client	firefox-debuginfo	before 0:45.5.1-1.el6_8	0:45.5.1-1.el6_8
Red Hat:enterprise_linux:6::client	thunderbird	before 0:45.5.1-1.el6_8	0:45.5.1-1.el6_8
Red Hat:enterprise_linux:6::client	thunderbird-debuginfo	before 0:45.5.1-1.el6_8	0:45.5.1-1.el6_8
Red Hat:enterprise_linux:7::client	firefox	before 0:45.5.1-1.el7_3	0:45.5.1-1.el7_3
Red Hat:enterprise_linux:7::client	firefox-debuginfo	before 0:45.5.1-1.el7_3	0:45.5.1-1.el7_3
Red Hat:enterprise_linux:7::client	thunderbird	before 0:45.5.1-1.el7_3	0:45.5.1-1.el7_3
Red Hat:enterprise_linux:7::client	thunderbird-debuginfo	before 0:45.5.1-1.el7_3	0:45.5.1-1.el7_3
SUSE:Linux Enterprise Desktop 12 SP1	MozillaFirefox	before 45.5.1esr-93.1	45.5.1esr-93.1
SUSE:Linux Enterprise Server 11 SP2-LTSS	mozilla-nss	before 3.21.3-30.1	3.21.3-30.1
SUSE:Linux Enterprise Server 11 SP2-LTSS	MozillaFirefox	before 45.5.1esr-63.1	45.5.1esr-63.1
SUSE:Linux Enterprise Software Development Kit 11 SP4	mozilla-nss	before 3.21.3-39.1	3.21.3-39.1
SUSE:Linux Enterprise Software Development Kit 11 SP4	MozillaFirefox	before 45.5.1esr-59.1	45.5.1esr-59.1
SUSE:Package Hub 12	MozillaThunderbird	before 45.5.1-17.1	45.5.1-17.1

Same product

debian: all records

Other highest-scoring records for the same primary product.

CVE-2024-44308The issue was addressed with improved checks.KEV
68This week
CVE-2021-25216A second vulnerability in BIND's GSSAPI security policy negotiation can be targeted by a buffer overflow attack
64This week
CVE-2024-44309A cookie management issue was addressed with improved state management.KEV
62This week

Published before and after this one in the same product

← EarlierCVE-2018-1000301May 24, 2018 · curl version curl 7.20.0 to and including curl 7.59.0 contains a CWE-126: Buffer Over-read vulnerability in denial of service that can…
38Monitor
← EarlierCVE-2018-11235May 30, 2018 · In Git before 2.13.7, 2.14.x before 2.14.4, 2.15.x before 2.15.2, 2.16.x before 2.16.4, and 2.17.x before 2.17.1, remote code execution can…
45Plan
Later →CVE-2016-9893Jun 11, 2018 · Memory safety bugs were reported in Thunderbird 45.5.
40Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
debian:firefox-esr	45.5.1esr-1 · Debian:12	Package registry (OSV)
debian:icedove	1:45.5.1-1~deb7u1 · Debian:7	Package registry (OSV)
red hat:firefox	0:45.5.1-1.el5_11 · Red Hat:enterprise_linux:5::client	Package registry (OSV)
red hat:firefox-debuginfo	0:45.5.1-1.el5_11 · Red Hat:enterprise_linux:5::client	Package registry (OSV)
red hat:thunderbird	0:45.5.1-1.el5_11 · Red Hat:enterprise_linux:5::client	Package registry (OSV)
red hat:thunderbird-debuginfo	0:45.5.1-1.el5_11 · Red Hat:enterprise_linux:5::client	Package registry (OSV)
suse:mozilla-nss	3.21.3-39.1 · SUSE:Linux Enterprise Software Development Kit 11 SP4	Package registry (OSV)
suse:MozillaFirefox	45.5.1esr-93.1 · SUSE:Linux Enterprise Desktop 12 SP1	Package registry (OSV)
suse:MozillaThunderbird	45.5.1-17.1 · SUSE:Package Hub 12	Package registry (OSV)

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

Metasploit module ×1
Exploit-DB entry ×2
Proof-of-concept repository on GitHub ×4

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Proof-of-concept repository on GitHub	4 repositories	2017-02-08 → 2021-10-08
Exploit-DB entry	remote	2017-07-14
Exploit-DB entry	remote	2017-01-24
Metasploit module	exploit/windows/browser/firefox_smil_uafFirefox nsSMILTimeContainer::NotifyTimeChange() RCEexploit	2016-11-30

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

MetasploitNov 30, 2016-559 d
First PoCJan 24, 2017-504 d
PublishedJun 11, 2018
CISA KEVJun 22, 2023+1836 d
TodayNov 14, 2026+3077 d

Bug bounty scope

TorHackerOne · paid

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate.

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: none
Availability: none

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: None
Availability impact: None

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

nvd-primary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1free(dev->buf);
2/* ... another thread is still running ... */
3process(dev->buf);

Fixed

1lock(&dev->lock);
2free(dev->buf);
3dev->buf = NULL;
4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log (1)

Fix✗ → ✓Sep 28, 2026, 10:48 PM UTC

For records you follow, these changes also arrive as notifications. →

References

rhn.redhat.com/errata/RHSA-2016-2843.html

Show all references (8 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records

Noroxi analysis

What does it mean in your environment?

We use this product, ask for help

Data sources and verification

CNA: mozilla

CVE.org (CNA)Oct 21, 2025, 11:45 PM UTC
CISA ADPOct 21, 2025, 11:45 PM UTC
NVDJun 16, 2026, 8:55 PM UTC
FIRST EPSSNov 11, 2026, 12:00 AM UTC
OSV / GHSANov 13, 2026, 3:18 AM UTC
Exploit-DBNov 13, 2026, 3:17 AM UTC
MetasploitNov 13, 2026, 3:18 AM UTC
PoC-in-GitHubNov 13, 2026, 3:18 AM UTC

Each line is when that source was last processed for this record.