CVE-2021-40837: A vulnerability affecting F-Secure antivirus engine before Capricorn update 2022-02-01_01 was discovered where

Q: How do I fix CVE-2021-40837?

atlant: upgrade to 2022-02-01_01; internet gatekeeper: upgrade to 2022-02-01_01; linux security: upgrade to 2022-02-01_01. Exact commands for each OS are on this page.

Q: Is CVE-2021-40837 being exploited?

CVE-2021-40837 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-2021-40837 affect?

CVE-2021-40837 affects atlant, internet gatekeeper, linux security. Severity is medium (CVSS 4.6). A vulnerability affecting F-Secure antivirus engine before Capricorn update 2022-02-01_01 was discovered whereby decompression of ACE file causes the scanner service to stop. The vulnerability can be exploited remotely by an attacker. A suc

Q: How urgent is CVE-2021-40837?

Priority 34/100. On your watchlist

Routine

MEDIUM 4.6WATCHLISTUPGRADEUPGRADEUPGRADE

CVE-2021-40837 is a medium-severity flaw (CVSS 4.6) affecting atlant, internet gatekeeper, linux security. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability affecting F-Secure antivirus engine before Capricorn update 2022-02-01_01 was discovered whereby decompression of ACE file causes the scanner service to stop. The vulnerability can be exploited remotely by an attacker. A successful attack will result in denial-of-service of the antivirus engine.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	4.6 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Published	2022-02-09
Last modified	2026-06-17

Publisher (CNA): F-Secure · Vendor: f-secure

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

Am I affected?

Timeline

2022-02-09 13:15 UTCPublished CVE record published
2026-06-17 04:07 UTCUpdated Record last modified

f-secure atlant UPGRADE

Affected: < 2022-02-01_01

Fixed in: 2022-02-01_01

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2022-02-01_01 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade atlant

Note

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

f-secure internet gatekeeper UPGRADE

Affected: < 2022-02-01_01

Fixed in: 2022-02-01_01

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy internet-gatekeeper || rpm -q internet-gatekeeper || internet-gatekeeper --version

2. UPGRADE to 2022-02-01_01 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade internet-gatekeeper

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade internet-gatekeeper

Note

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

f-secure linux security UPGRADE

Affected: < 2022-02-01_01

Fixed in: 2022-02-01_01

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy linux-security || rpm -q linux-security || linux-security --version

2. UPGRADE to 2022-02-01_01 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade linux-security

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade linux-security

Note

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

f-secure security cloud UPGRADE

Affected: < 2022-02-01_01

Fixed in: 2022-02-01_01

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy security-cloud || rpm -q security-cloud || security-cloud --version

2. UPGRADE to 2022-02-01_01 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade security-cloud

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade security-cloud

Note

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

f-secure elements endpoint detection and response UPGRADE

Affected: < 2022-02-01_01

Fixed in: 2022-02-01_01

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy elements-endpoint-detection-and-response || rpm -q elements-endpoint-detection-and-response || elements-endpoint-detection-and-response --version

2. UPGRADE to 2022-02-01_01 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade elements-endpoint-detection-and-response

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade elements-endpoint-detection-and-response

Note

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

f-secure elements endpoint protection UPGRADE

Affected: < 2022-02-01_01

Fixed in: 2022-02-01_01

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy elements-endpoint-protection || rpm -q elements-endpoint-protection || elements-endpoint-protection --version

2. UPGRADE to 2022-02-01_01 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade elements-endpoint-protection

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade elements-endpoint-protection

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-2021-40837?

atlant: upgrade to 2022-02-01_01; internet gatekeeper: upgrade to 2022-02-01_01; linux security: upgrade to 2022-02-01_01. Exact commands for each OS are on this page.

Is CVE-2021-40837 being exploited?

CVE-2021-40837 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-2021-40837 affect?

CVE-2021-40837 affects atlant, internet gatekeeper, linux security. Severity is medium (CVSS 4.6). A vulnerability affecting F-Secure antivirus engine before Capricorn update 2022-02-01_01 was discovered whereby decompression of ACE file causes the scanner service to stop. The vulnerability can be exploited remotely by an attacker. A suc

How urgent is CVE-2021-40837?

Priority 34/100. On your watchlist

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References

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