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CVE-2025-70888

30
FAUCET Score

CVE-2025-70888 is a critical privilege escalation vulnerability affecting mtrojnar Osslsigncode versions 2.10 and earlier, specifically within the osslsigncode.c component. This flaw allows a remote attacker to achieve complete compromise of confidentiality, integrity, and availability with no user interaction or prior privileges, as indicated by its CVSS score of 9.8 (CRITICAL). Despite its severe potential impact, there is currently no evidence of active exploitation, public exploit code, or significant community discussion regarding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.10CPE matchmatch criteria
cpe:2.3:a:osslsigncode_project:osslsigncode:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.48%
Probability of exploitation in next 30 days
EPSS Percentile
38.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0048 is in the 17th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

microsoft2026-Mar/CVE-2025-70888Low

An issue in mtrojnar Osslsigncode affected at v2.10 and before allows a remote attacker to escalate privileges via the osslsigncode.c component

Mar 10, 2026

References

github.com / mtrojnar/osslsigncode/issues/475
Issue TrackingThird Party Advisory
github.com / mtrojnar/osslsigncode/pull/477
Issue Tracking
github.com / ralphje/signify/issues/60
Issue TrackingThird Party Advisory