CVE-2021-47787: TotalAV 5.15.69 contains an unquoted service path vulnerability in multiple system services running with Local

Routine

HIGH 7.8DOWNGRADE

CVE-2021-47787 is a high-severity flaw (CVSS 7.8) affecting totalav. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

TotalAV 5.15.69 contains an unquoted service path vulnerability in multiple system services running with LocalSystem privileges. Attackers can place malicious executables in specific unquoted path segments to potentially gain SYSTEM-level access by exploiting the service path configuration.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 83%)
CISA exploited list	No
Weakness	CWE-428
Published	2026-01-16
Last modified	2026-10-06

Publisher (CNA): VulnCheck · Vendor: totalav

Last updated 2026-10-06 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-16 00:16 UTCPublished CVE record published
2026-10-06 22:10 UTCUpdated Record last modified

totalav totalav DOWNGRADE

Affected: 5.15.69

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.15.69

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.15.69 (Debian / Ubuntu)

apt-cache madison totalav sudo apt install totalav=<VERSION_BEFORE_5.15.69> sudo apt-mark hold totalav

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

dnf --showduplicates list totalav sudo dnf downgrade totalav-<VERSION_BEFORE_5.15.69> sudo dnf versionlock add totalav

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-2021-47787?

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

Is CVE-2021-47787 being exploited?

CVE-2021-47787 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-2021-47787 affect?

CVE-2021-47787 affects totalav. Severity is high (CVSS 7.8). TotalAV 5.15.69 contains an unquoted service path vulnerability in multiple system services running with LocalSystem privileges. Attackers can place malicious executables in specific unquoted path segments to potentially gain SYSTEM-level a

How urgent is CVE-2021-47787?

Priority 37/100. High severity; Public exploit reference

Related CVEs

CVE-2024-31771 HIGH 7.8 DOWNGRADE Insecure Permission vulnerability in TotalAV v.6.0.740 allows a local attacker to escalate privileges via a cr

References

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