CVE-2020-18171: TechSmith Snagit 19.1.0.2653 uses Object Linking and Embedding (OLE) which can allow attackers to obfuscate an

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HIGH 8.8DOWNGRADE

CVE-2020-18171 is a high-severity flaw (CVSS 8.8) affecting snagit. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

TechSmith Snagit 19.1.0.2653 uses Object Linking and Embedding (OLE) which can allow attackers to obfuscate and embed crafted files used to escalate privileges. NOTE: This implies that Snagit's use of OLE is a security vulnerability unto itself and it is not. See reference document for more details.

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	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Weakness	CWE-269
Published	2021-07-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: techsmith

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

Am I affected?

Timeline

2021-07-26 20:15 UTCPublished CVE record published
2026-06-17 02:59 UTCUpdated Record last modified

techsmith snagit DOWNGRADE

Affected: 19.1.0.2653

Fixed in: no fixed release known

Safe to downgrade to: a release before 19.1.0.2653

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 19.1.0.2653 (Debian / Ubuntu)

apt-cache madison snagit sudo apt install snagit=<VERSION_BEFORE_19.1.0.2653> sudo apt-mark hold snagit

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

dnf --showduplicates list snagit sudo dnf downgrade snagit-<VERSION_BEFORE_19.1.0.2653> sudo dnf versionlock add snagit

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-2020-18171?

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

Is CVE-2020-18171 being exploited?

CVE-2020-18171 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-2020-18171 affect?

CVE-2020-18171 affects snagit. Severity is high (CVSS 8.8). TechSmith Snagit 19.1.0.2653 uses Object Linking and Embedding (OLE) which can allow attackers to obfuscate and embed crafted files used to escalate privileges. NOTE: This implies that Snagit's use of OLE is a security vulnerability unto it

How urgent is CVE-2020-18171?

Priority 44/100. High severity; Public exploit reference

Related CVEs

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CVE-2019-13382 HIGH 7.8 DOWNGRADE UploaderService in SnagIT 2019.1.2 allows elevation of privilege by placing an invalid presentation file in %P

References

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