CVE-2021-45916: The programming function of Shockwall system has an improper input validation vulnerability

Q: How do I fix CVE-2021-45916?

shenwang endpoint protection security system: upgrade to 7.20.0401. Exact commands for each OS are on this page.

Q: Is CVE-2021-45916 being exploited?

CVE-2021-45916 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-2021-45916 affect?

CVE-2021-45916 affects shenwang endpoint protection security system. Severity is low (CVSS 3.5). The programming function of Shockwall system has an improper input validation vulnerability. An authenticated attacker within the local area network can send malicious response to the server to disrupt the service partially.

Q: How urgent is CVE-2021-45916?

Priority 18/100. No elevated risk signals yet.

Routine

LOW 3.5UPGRADE

CVE-2021-45916 is a low-severity flaw (CVSS 3.5) affecting shenwang endpoint protection security system. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The programming function of Shockwall system has an improper input validation vulnerability. An authenticated attacker within the local area network can send malicious response to the server to disrupt the service partially.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	3.5 (Low)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-20
Published	2022-01-03
Last modified	2026-06-17

Publisher (CNA): TWCERT/CC · Vendor: smr

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

Am I affected?

Timeline

2022-01-03 10:15 UTCPublished CVE record published
2026-06-17 04:14 UTCUpdated Record last modified

smr shenwang endpoint protection security system UPGRADE

Affected: < 7.20.0401

Fixed in: 7.20.0401

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy shenwang-endpoint-protection-security-system || rpm -q shenwang-endpoint-protection-security-system || shenwang-endpoint-protection-security-system --version

2. UPGRADE to 7.20.0401 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade shenwang-endpoint-protection-security-system

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade shenwang-endpoint-protection-security-system

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-2021-45916?

shenwang endpoint protection security system: upgrade to 7.20.0401. Exact commands for each OS are on this page.

Is CVE-2021-45916 being exploited?

CVE-2021-45916 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-2021-45916 affect?

CVE-2021-45916 affects shenwang endpoint protection security system. Severity is low (CVSS 3.5). The programming function of Shockwall system has an improper input validation vulnerability. An authenticated attacker within the local area network can send malicious response to the server to disrupt the service partially.

How urgent is CVE-2021-45916?

Priority 18/100. No elevated risk signals yet.

References

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