CVE-2021-3345

highpriority · track · 41EPSS 0.011 · 64 %ileexploit · PoCEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

2 exploits · PoC

Likely / severe?

1.06% (64th) EPSS

CVSS 7.2 · high

Is it mine?

6 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

_gcry_md_block_write in cipher/hash-common.c in Libgcrypt version 1.9.0 has a heap-based buffer overflow when the digest final function sets a large count value. It is recommended to upgrade to 1.9.1 or later.

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.07.2highAV:L/AC:L/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 3.9 · impact 10

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.17.8highAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.4highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Psecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimaryCWE-787US

exploits (2)

Public proof-of-concept and weaponised exploit code.

MLGRadish/CVE-2021-3345POC exploit of CVE-2021-3345, a vulnerability in libgcrypt version 1.9.0PoC · poc_in_github
SpiralBL0CK/CVE-2021-3345Actual working exploit for CVE-2021-3345PoC · poc_in_github

affected products (6)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
Werner Koch Libgcrypt≤ 1.9.0fstec_bduRU
ООО «Юбитех» UBLinux≤ 2102fstec_bduRU
ООО «Юбитех» UBLinux≤ 21.1fstec_bduRU
gnupg libgcrypt= 1.9.0nvdUScpe:2.3:a:gnupg:libgcrypt:*:*:*:*:*:*:*:*
oracle communications billing and revenue management= 12.0.0.3.0nvdUScpe:2.3:a:oracle:communications_billing_and_revenue_management:*:*:*:*:*:*:*:*

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2021-01-29modified 2026-06-17

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+16120 more

references (22)

External citations — patches, advisories, analysis.

scry

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