CVE-2021-32840
Detail
Modified After Enrichment
This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.
Description
SharpZipLib (or #ziplib) is a Zip, GZip, Tar and BZip2 library. Prior to version 1.3.3, a TAR file entry `../evil.txt` may be extracted in the parent directory of `destFolder`. This leads to arbitrary file write that may lead to code execution. The vulnerability was patched in version 1.3.3.
Metrics
NVD enrichment efforts reference publicly available information to associate
vector strings. CVSS information contributed by other sources is also
displayed.
CVSS 4.0 Severity and Vector Strings:
NVD assessment
not yet provided.
CVSS 3.x Severity and Vector Strings:
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
CVSS 2.0 Severity and Vector Strings:
Vector:
(AV:N/AC:L/Au:N/C:P/I:P/A:P)
References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving NIST webspace.
We have provided these links to other web sites because they
may have information that would be of interest to you. No
inferences should be drawn on account of other sites being
referenced, or not, from this page. There may be other web
sites that are more appropriate for your purpose. NIST does
not necessarily endorse the views expressed, or concur with
the facts presented on these sites. Further, NIST does not
endorse any commercial products that may be mentioned on
these sites. Please address comments about this page to [email protected].
Change History
5 change records found show changes
CVE Modified by CISA-ADP
6/16/2026 11:53:44 PM
| Action |
Type |
Old Value |
New Value |
| Added |
SSVC |
{"timestamp":"2025-04-22T15:51:52.407516Z","id":"CVE-2021-32840","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}
|
CVE Modified by GitHub, Inc.
6/16/2026 11:53:44 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Affected |
[{"vendor":"icsharpcode","product":"sharpziplib","versions":[{"version":"1.3.3","lessThan":"1.3.3","versionType":"custom","status":"affected"},{"version":"0.86.0","lessThan":"0.86.0*","versionType":"custom","status":"affected"}]}]
|
CVE Modified by CVE
11/21/2024 1:07:51 AM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
https://github.com/icsharpcode/SharpZipLib/commit/a0e96de70b5264f4c919b09253b1522bc7a221cc
|
| Added |
Reference |
https://github.com/icsharpcode/SharpZipLib/releases/tag/v1.3.3
|
| Added |
Reference |
https://securitylab.github.com/advisories/GHSL-2021-125-sharpziplib/
|
CVE Modified by GitHub, Inc.
5/14/2024 5:06:58 AM
| Action |
Type |
Old Value |
New Value |
Initial Analysis by NIST
2/07/2022 2:10:05 PM
| Action |
Type |
Old Value |
New Value |
| Added |
CVSS V3.1 |
NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
|
| Added |
CVSS V2 |
NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P)
|
| Added |
CWE |
NIST CWE-22
|
| Added |
CPE Configuration |
OR
*cpe:2.3:a:sharpziplib_project:sharpziplib:*:*:*:*:*:*:*:* versions up to (excluding) 1.3.3
|
| Changed |
Reference Type |
https://github.com/icsharpcode/SharpZipLib/commit/a0e96de70b5264f4c919b09253b1522bc7a221cc No Types Assigned
|
https://github.com/icsharpcode/SharpZipLib/commit/a0e96de70b5264f4c919b09253b1522bc7a221cc Patch, Third Party Advisory
|
| Changed |
Reference Type |
https://github.com/icsharpcode/SharpZipLib/releases/tag/v1.3.3 No Types Assigned
|
https://github.com/icsharpcode/SharpZipLib/releases/tag/v1.3.3 Third Party Advisory
|
| Changed |
Reference Type |
https://securitylab.github.com/advisories/GHSL-2021-125-sharpziplib/ No Types Assigned
|
https://securitylab.github.com/advisories/GHSL-2021-125-sharpziplib/ Exploit, Third Party Advisory
|
Quick Info
CVE Dictionary Entry: CVE-2021-32840 NVD
Published Date: 01/26/2022 NVD
Last Modified: 06/16/2026
Source: GitHub, Inc.
|
