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Weekly Signal
Live intelligence Updated 20 Aug 2026 · 01:51 UTC

Debian, Exiftool Project, Fedoraproject +1 more · Debian Linux, Exiftool, Fedora

CVE-2021-22204

ExifTool Remote Code Execution Vulnerability

Recommended action

Validate affected assets and exposure now, then remediate on an accelerated schedule. Debian Security advisory Dsa 4910

View response plan
CVSS7.8
EPSS100.0%
KEVYes
ExploitationConfirmed exploitation
RemediationExplicit patch identified ↓

Assessment

Why it matters

CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 100.0%; technical severity is CVSS 7.8.

Improper neutralization of user data in the DjVu file format in ExifTool versions 7.44 and up allows arbitrary code execution when parsing the malicious image

Who should care

  • Teams operating Debian Linux, Exiftool, Fedora
  • Vulnerability and exposure management teams
  • Security operations teams monitoring exploitation activity

Response plan

What I would do

  1. Confirm whether Debian Linux, Exiftool, Fedora is present in the environment.
  2. Identify affected versions and establish whether vulnerable services are exposed or reachable.
  3. Debian Security advisory Dsa 4910
  4. Review relevant security telemetry for evidence of attempted or successful exploitation.
  5. Document the remediation decision and track it to verified completion.

Treatment intelligence

Remediation intelligence

Not yet verified

Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.

Verification noteAutomated link verification has not completed for this guidance yet.

Patch

Upgrade

Advisory

Required Action

Technical details

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
CWE-95
Affected versions
Debian Debian Linux (Version 9.0 | Version 10.0); Exiftool Project Exiftool (Start Including 7.44, End Excluding 12.24); Fedoraproject Fedora (Version 32 | Version 33 | Version 34); Perl Exiftool
Fixed versions
Exiftool Project Exiftool (Fixed from 12.24)
Published
23 April 2021
Attack vector
Local
Privileges required
None
User interaction
Required

Signal timeline

  1. CVE published
  2. Added to CISA KEV
  3. Latest EPSS score: 100.0%
  4. Signal calculated at 83

External references

Live public intelligence This assessment combines public-source evidence. Validate the affected product, version and exposure against your own environment before making a risk decision.