CVE-2015-8710 [Critical] | Memory Corruption in Libxml2

CVE-2015-8710 is rated High Risk (71.1/100): CVSS Critical severity, with high exploitation likelihood (EPSS 4.88%, 91th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-26	4.79%	4.88%	+0.09%
2	2026-06-15	4.74%	4.79%	+0.05%
3	2025-03-30	—	4.74%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-26

4.79%

4.88%

+0.09%

2026-06-15

4.74%

4.79%

+0.05%

2025-03-30

—

4.74%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
9.8	3.1	CRITICAL	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. 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:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. 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.	3.9	5.9	[email protected]
7.5	2.0	HIGH	`AV:N/AC:L/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:L) Exploitation conditions are straightforward and predictable. 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.	10.0	6.4	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

9.8

3.1

CRITICAL

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

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
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:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
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.

3.9

5.9

[email protected]

7.5

2.0

HIGH

AV:N/AC:L/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:L): Exploitation conditions are straightforward and predictable.
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.

10.0

6.4

[email protected]

OS Trackers for CVE-2015-8710

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2015-8710 not yet assigned priority: Debian including 1 source packages (libxml2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2015-8710
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2015-8710
`suse`	medium	CVE-2015-8710 severity moderate: SUSE including 39 source package names (libxml2, libxml2-2, …), 182 product×package rows across 47 product lines (HPE Helion OpenStack 8, SUSE Linux Enterprise Desktop 11 SP3, … (47 product lines)): Fixed 109, Known Not Affected 73.	https://www.suse.com/security/cve/CVE-2015-8710/
`ubuntu`	medium	CVE-2015-8710 medium priority: Ubuntu including 1 source packages (libxml2), 5 status rows across 5 suites (precise, trusty, upstream, vivid, wily): released 5.	https://ubuntu.com/security/CVE-2015-8710

Affected software / configurations for CVE-2015-8710

Vendor	Product	Version	Raw CPE
xmlsoft	libxml2	< 2.9.3	cpe:2.3:a:xmlsoft:libxml2::::::::
debian	debian_linux	7.0	cpe:2.3:o:debian:debian_linux:7.0:::::::*
debian	debian_linux	8.0	cpe:2.3:o:debian:debian_linux:8.0:::::::*
debian	debian_linux	9.0	cpe:2.3:o:debian:debian_linux:9.0:::::::*

References for CVE-2015-8710

URL	Tags
http://rhn.redhat.com/errata/RHSA-2016-1089.html	Third Party Advisory
http://www.debian.org/security/2015/dsa-3430	Third Party Advisory
http://www.openwall.com/lists/oss-security/2015/04/19/4	Mailing List Patch
http://www.openwall.com/lists/oss-security/2015/09/13/1	Mailing List
http://www.openwall.com/lists/oss-security/2015/12/31/7	Mailing List
http://www.securityfocus.com/bid/79811	Third Party Advisory VDB Entry
https://bugzilla.gnome.org/show_bug.cgi?id=746048	Issue Tracking
https://git.gnome.org/browse/libxml2/commit/?id=e724879d964d774df9b7969fc846605aa1bac54c	Third Party Advisory
https://hackerone.com/reports/57125#activity-384861	Third Party Advisory

URL

CVE-2015-8710

Exploit prediction scoring system (EPSS) score for CVE-2015-8710

Common vulnerability scoring system (CVSS) metrics for CVE-2015-8710

Weakness enumeration for CVE-2015-8710

OS Trackers for CVE-2015-8710

Affected software / configurations for CVE-2015-8710

References for CVE-2015-8710