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CVE-2015-8790

14
FAUCET Score

CVE-2015-8790 is a medium-severity information disclosure vulnerability affecting libEBML versions prior to 1.3.3, including products like Matroska. It stems from an invalid memory access in the EbmlUnicodeString::UpdateFromUTF8 function, triggered by a crafted UTF-8 string, allowing attackers to potentially obtain sensitive information from process heap memory. The attack requires user interaction (UI:R) and can be executed over a network (AV:N), but has low impact on confidentiality (C:L) and no impact on integrity or availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.3.2CPE matchmatch criteria
cpe:2.3:a:matroska:libebml:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

4.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.85%
Probability of exploitation in next 30 days
EPSS Percentile
76.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0185 is in the 88th percentile among its peer group of 26,234 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

github_advisoryvendor investigatingvia nvd_reference
View patch

References

lists.matroska.org / pipermail/matroska-users/2015-October/006985.html
Vendor Advisory
lists.opensuse.org / opensuse-updates/2016-01/msg00035.html
github.com / Matroska-Org/libebml/blob/release-1.3.3/ChangeLog
Vendor Advisory
github.com / Matroska-Org/libebml/commit/ababb64e0c792ad2a314245233db0833ba12036b
debian.org / security/2016/dsa-3538
securityfocus.com / bid/85307
securityfocus.com / bid/95124
talosintelligence.com / reports/TALOS-2016-0036