CVE-2016-3632 [High] | Out-of-bounds Write in Libtiff

CVE-2016-3632 is rated Moderate Risk (64/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.15%). EPSS rose +2.64% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.51%	3.15%	+2.64%
2	2026-03-25	0.26%	0.51%	+0.26%
3	2026-01-25	—	0.26%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.51%

3.15%

+2.64%

2026-03-25

0.26%

0.51%

+0.26%

2026-01-25

—

0.26%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.8	3.0	HIGH	`CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.8	5.9	[email protected]
6.8	2.0	MEDIUM	`AV:N/AC:M/Au:N/C:P/I:P/A:P` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:M) Exploitation needs some favorable conditions, but not exceptional ones. Authentication (AU:N) No authentication is required. Confidentiality impact (C:P) Partial confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:P) Partial availability impact.	8.6	6.4	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.8

3.0

HIGH

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

1.8

5.9

[email protected]

6.8

2.0

MEDIUM

AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:M): Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:P): Partial confidentiality impact.
Integrity impact (I:P): Partial integrity impact.
Availability impact (A:P): Partial availability impact.

8.6

6.4

[email protected]

OS Trackers for CVE-2016-3632

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2016-3632 not yet assigned priority: Debian including 1 source packages (tiff), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2016-3632
`gentoo`	normal	CVE-2016-3632: 1 GLSA(s) (201701-16), 1 atom(s) (media-libs/tiff); latest impact normal.	https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2016-3632
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2016-3632
`suse`	low	CVE-2016-3632 severity low: SUSE including 22 source package names (beta1:libtiff5-4.0.9-44.15.2, libtiff-4.0.3-25.el7_2, …), 55 product×package rows across 27 product lines (Container caasp/v4/nginx-ingress-controller, Image SLES12-SP5-Azure-SAP-BYOS, … (27 product lines)): Fixed 55.	https://www.suse.com/security/cve/CVE-2016-3632/
`ubuntu`	medium	CVE-2016-3632 medium priority: Ubuntu including 1 source packages (tiff), 7 status rows across 7 suites (precise, trusty, upstream, wily, xenial, yakkety, zesty): released 4, ignored 2, not-affected 1.	https://ubuntu.com/security/CVE-2016-3632

Affected software / configurations for CVE-2016-3632

Vendor	Product	Version	Raw CPE
libtiff	libtiff	<= 4.0.6	cpe:2.3:a:libtiff:libtiff::::::::
oracle	vm_server	3.3	cpe:2.3:o:oracle:vm_server:3.3::::::x86:
oracle	vm_server	3.4	cpe:2.3:o:oracle:vm_server:3.4::::::x86:

References for CVE-2016-3632

URL	Tags
http://bugzilla.maptools.org/show_bug.cgi?id=2549	Issue Tracking
http://rhn.redhat.com/errata/RHSA-2016-1546.html
http://rhn.redhat.com/errata/RHSA-2016-1547.html
http://www.openwall.com/lists/oss-security/2016/04/08/9	Mailing List Third Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html	Patch Third Party Advisory
http://www.securityfocus.com/bid/85953
http://www.securityfocus.com/bid/85960	Third Party Advisory VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1325095	Issue Tracking
https://security.gentoo.org/glsa/201701-16

URL

CVE-2016-3632

Exploit prediction scoring system (EPSS) score for CVE-2016-3632

Common vulnerability scoring system (CVSS) metrics for CVE-2016-3632

Weakness enumeration for CVE-2016-3632

OS Trackers for CVE-2016-3632

Affected software / configurations for CVE-2016-3632

References for CVE-2016-3632