CVE-2021-27232: The RTSPLive555.dll ActiveX control in Pelco Digital Sentry Server 7.18.72.11464 has a SetCameraConnectionPara

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HIGH 8.8DOWNGRADE

CVE-2021-27232 is a high-severity flaw (CVSS 8.8) affecting digital sentry server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The RTSPLive555.dll ActiveX control in Pelco Digital Sentry Server 7.18.72.11464 has a SetCameraConnectionParameter stack-based buffer overflow. This can be exploited by a remote attacker to potentially execute arbitrary attacker-supplied code. The victim would have to visit a malicious webpage using Internet Explorer where the exploit could be triggered.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.7% (top 22%)
CISA exploited list	No
Weakness	CWE-787
Published	2021-02-16
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: pelco

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

Am I affected?

Timeline

2021-02-16 15:15 UTCPublished CVE record published
2026-06-17 03:44 UTCUpdated Record last modified

pelco digital sentry server DOWNGRADE

Affected: 7.18.72.11464

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.18.72.11464

1. Check installed version

apt-cache policy digital-sentry-server || rpm -q digital-sentry-server || digital-sentry-server --version

2. No fixed release: DOWNGRADE to a release before 7.18.72.11464 (Debian / Ubuntu)

apt-cache madison digital-sentry-server sudo apt install digital-sentry-server=<VERSION_BEFORE_7.18.72.11464> sudo apt-mark hold digital-sentry-server

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

dnf --showduplicates list digital-sentry-server sudo dnf downgrade digital-sentry-server-<VERSION_BEFORE_7.18.72.11464> sudo dnf versionlock add digital-sentry-server

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-2021-27232?

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

Is CVE-2021-27232 being exploited?

CVE-2021-27232 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-2021-27232 affect?

CVE-2021-27232 affects digital sentry server. Severity is high (CVSS 8.8). The RTSPLive555.dll ActiveX control in Pelco Digital Sentry Server 7.18.72.11464 has a SetCameraConnectionParameter stack-based buffer overflow. This can be exploited by a remote attacker to potentially execute arbitrary attacker-supplied c

How urgent is CVE-2021-27232?

Priority 55/100. High severity; Public exploit reference

Software pages

Internet Explorer vulnerabilities

Related CVEs

CVE-2021-27197 HIGH 8.1 UPGRADE DSUtility.dll in Pelco Digital Sentry Server before 7.19.67 has an arbitrary file write vulnerability
CVE-2021-27184 HIGH 7.5 DOWNGRADE Pelco Digital Sentry Server 7.18.72.11464 has an XML External Entity vulnerability (exploitable via the DTD pa

References

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