MEDIUM
CVE-2021-24032
CWE-277Published: March 4, 2021· Updated: Jun 17, 2026
4.7
CVSS v3.1
Official Description
Beginning in v1.4.1 and prior to v1.4.9, due to an incomplete fix for CVE-2021-24031, the Zstandard command-line utility created output files with default permissions and restricted those permissions immediately afterwards. Output files could therefore momentarily be readable or writable to unintended parties.
Technical Analysis
CVE-2021-24032 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 4.7.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityHigh
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Affected Vendors & Products
facebook1 product(s)
zstandard
Source: NVD CPE · 1 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (6)
→
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982519Patch · Third Party Advisory
→
https://github.com/facebook/zstd/issues/2491Issue Tracking · Patch · Third Party Advisory
→
https://www.facebook.com/security/advisories/cve-2021-24032Third Party Advisory
→
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982519Patch · Third Party Advisory
→
https://github.com/facebook/zstd/issues/2491Issue Tracking · Patch · Third Party Advisory
→
https://www.facebook.com/security/advisories/cve-2021-24032Third Party Advisory
Quick Facts
CVE IDCVE-2021-24032
CVSS Score4.7 / 10
SeverityMEDIUM
WeaknessCWE-277
CISA KEVNo
Affected1 vendor(s)
PublishedMar 4, 2021
Related CVEs (CWE-277)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-24032 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.