CVE-2021-26567

mediumpriority · track · 31EPSS 0.011 · 66 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.13% (66th) EPSS

CVSS 6.5 · medium

Is it mine?

6 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

Stack-based buffer overflow vulnerability in frontend/main.c in faad2 before 2.2.7.1 allow local attackers to execute arbitrary code via filename and pathname options.

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⚠ sources disagree · medium–high · 6.5–7.8

v2.06.5mediumAV:N/AC:L/Au:S/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8 · impact 6.4

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

v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimaryCWE-121US

affected products (6)

Products and version ranges known to be affected.

github/knik0 faad2unspecified → 2.2.7.1enisa_euvdEU
faad2 project faad2< 2.2.7.1nvdUScpe:2.3:a:faad2_project:faad2:*:*:*:*:*:*:*:*
synology diskstation manager< 6.2.3-25426-3nvdUScpe:2.3:o:synology:diskstation_manager:*:*:*:*:*:*:*:*
synology diskstation manager unified controller= 3.0nvdUScpe:2.3:o:synology:diskstation_manager_unified_controller:*:*:*:*:*:*:*:*
synology skynas firmwareall versionsnvdUScpe:2.3:o:synology:skynas_firmware:*:*:*:*:*:*:*:*
synology vs960hd firmwareall versionsnvdUScpe:2.3:o:synology:vs960hd_firmware:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2021-02-26modified 2026-06-17

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+16120 more

references (7)

External citations — patches, advisories, analysis.

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