CVE-2021-25694: Teradici PCoIP Graphics Agent for Windows prior to 21.03 does not validate NVENC.dll

Q: How do I fix CVE-2021-25694?

pcoip graphics agent: upgrade to 21.03. Exact commands for each OS are on this page.

Q: Is CVE-2021-25694 being exploited?

CVE-2021-25694 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-2021-25694 affect?

CVE-2021-25694 affects pcoip graphics agent. Severity is high (CVSS 7.8). Teradici PCoIP Graphics Agent for Windows prior to 21.03 does not validate NVENC.dll. An attacker could replace the .dll and redirect pixels elsewhere.

Routine

HIGH 7.8UPGRADE

CVE-2021-25694 is a high-severity flaw (CVSS 7.8) affecting pcoip graphics agent. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Teradici PCoIP Graphics Agent for Windows prior to 21.03 does not validate NVENC.dll. An attacker could replace the .dll and redirect pixels elsewhere.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 82%)
CISA exploited list	No
Weakness	CWE-427
Published	2021-05-13
Last modified	2026-06-17

Publisher (CNA): Teradici Corporation · Vendor: teradici

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

Am I affected?

Timeline

2021-05-13 13:15 UTCPublished CVE record published
2026-06-17 03:42 UTCUpdated Record last modified

teradici pcoip graphics agent UPGRADE

Affected: < 21.03

Fixed in: 21.03

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pcoip-graphics-agent || rpm -q pcoip-graphics-agent || pcoip-graphics-agent --version

2. UPGRADE to 21.03 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pcoip-graphics-agent

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pcoip-graphics-agent

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-2021-25694?

pcoip graphics agent: upgrade to 21.03. Exact commands for each OS are on this page.

Is CVE-2021-25694 being exploited?

CVE-2021-25694 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-2021-25694 affect?

CVE-2021-25694 affects pcoip graphics agent. Severity is high (CVSS 7.8). Teradici PCoIP Graphics Agent for Windows prior to 21.03 does not validate NVENC.dll. An attacker could replace the .dll and redirect pixels elsewhere.

How urgent is CVE-2021-25694?

Priority 32/100. High severity

Software pages

Windows vulnerabilities

Related CVEs

CVE-2021-25688 MEDIUM 5.5 UPGRADE UPGRADE Under certain conditions, Teradici PCoIP Agents for Windows prior to version 20.10.0 and Teradici PCoIP Agents

References

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