CVE-2025-70888: An issue in mtrojnar Osslsigncode affected at v2.10 and before allows a remote attacker to escalate privileges

Q: How do I fix CVE-2025-70888?

osslsigncode: upgrade to newer than 2.10. Exact commands for each OS are on this page.

Q: Is CVE-2025-70888 being exploited?

CVE-2025-70888 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-70888 affect?

CVE-2025-70888 affects osslsigncode. Severity is critical (CVSS 9.8). An issue in mtrojnar Osslsigncode affected at v2.10 and before allows a remote attacker to escalate privileges via the osslsigncode.c component

Q: How urgent is CVE-2025-70888?

Priority 50/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2025-70888 is a critical-severity flaw (CVSS 9.8) affecting osslsigncode. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-269
Published	2026-03-25
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: osslsigncode project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-25 20:16 UTCPublished CVE record published
2026-06-17 10:03 UTCUpdated Record last modified

osslsigncode project osslsigncode UPGRADE

Affected: <= 2.10

Fixed in: newer than 2.10

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy osslsigncode || rpm -q osslsigncode || osslsigncode --version

2. UPGRADE to newer than 2.10 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade osslsigncode

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade osslsigncode

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-70888?

osslsigncode: upgrade to newer than 2.10. Exact commands for each OS are on this page.

Is CVE-2025-70888 being exploited?

CVE-2025-70888 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-70888 affect?

CVE-2025-70888 affects osslsigncode. Severity is critical (CVSS 9.8). An issue in mtrojnar Osslsigncode affected at v2.10 and before allows a remote attacker to escalate privileges via the osslsigncode.c component

How urgent is CVE-2025-70888?

Priority 50/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-39855 MEDIUM 5.5 UPGRADE osslsigncode is a tool that implements Authenticode signing and timestamping
CVE-2026-39856 MEDIUM 5.5 UPGRADE osslsigncode is a tool that implements Authenticode signing and timestamping
CVE-2026-39853 HIGH 7.8 UPGRADE osslsigncode is a tool that implements Authenticode signing and timestamping

References

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