CVE-2025-67826: An issue was discovered in K7 Ultimate Security 17.0.2045

Routine

HIGH 7.7DOWNGRADE

CVE-2025-67826 is a high-severity flaw (CVSS 7.7) affecting k7 ultimate security. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in K7 Ultimate Security 17.0.2045. A Local Privilege Escalation (LPE) vulnerability in the K7 Ultimate Security antivirus can be exploited by a local unprivileged user on default installations of the product. Insecure access to a named pipe allows unprivileged users to edit any registry key, leading to a full compromise as SYSTEM.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.7 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.1% (top 96%)
CISA exploited list	No
Weakness	CWE-269
Published	2025-12-22
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: k7computing

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

Am I affected?

Timeline

2025-12-22 15:16 UTCPublished CVE record published
2026-06-17 09:58 UTCUpdated Record last modified

k7computing k7 ultimate security DOWNGRADE

Affected: 17.0.2045

Fixed in: no fixed release known

Safe to downgrade to: a release before 17.0.2045

1. Check installed version

apt-cache policy k7-ultimate-security || rpm -q k7-ultimate-security || k7-ultimate-security --version

2. No fixed release: DOWNGRADE to a release before 17.0.2045 (Debian / Ubuntu)

apt-cache madison k7-ultimate-security sudo apt install k7-ultimate-security=<VERSION_BEFORE_17.0.2045> sudo apt-mark hold k7-ultimate-security

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list k7-ultimate-security sudo dnf downgrade k7-ultimate-security-<VERSION_BEFORE_17.0.2045> sudo dnf versionlock add k7-ultimate-security

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2025-67826?

k7 ultimate security: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-67826 being exploited?

CVE-2025-67826 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-2025-67826 affect?

CVE-2025-67826 affects k7 ultimate security. Severity is high (CVSS 7.7). An issue was discovered in K7 Ultimate Security 17.0.2045. A Local Privilege Escalation (LPE) vulnerability in the K7 Ultimate Security antivirus can be exploited by a local unprivileged user on default installations of the product. Insecur

How urgent is CVE-2025-67826?

Priority 28/100. High severity

Related CVEs

CVE-2024-36424 MEDIUM 5.5 UPGRADE K7RKScan.sys in K7 Ultimate Security before 17.0.2019 allows local users to cause a denial of service (BSOD) b

References

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