CVE-2021-39537

mediumpriority · track · 36EPSS 0.032 · 88 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

3.24% (88th) EPSS

CVSS 6.8 · medium

Is it mine?

20 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

An issue was discovered in ncurses through v6.2-1. _nc_captoinfo in captoinfo.c has a heap-based buffer overflow.

cvss

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

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.8–8.8

v2.06.8mediumAV:N/AC:M/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 6.4

v3.18.8highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 2.8 · impact 5.9

v3.18.8highAV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USprimaryCWE-787US

affected products (20)

Products and version ranges known to be affected.

Apple macOS Big Sur 11.7.1all versionscert_bundDEcpe:/o:apple:mac_os:big_sur_11.7.1
Apple macOS Monterey 12.6.1all versionscert_bundDEcpe:/o:apple:mac_os:monterey_12.6.1
Apple macOS Ventura_13all versionscert_bundDEcpe:/o:apple:mac_os:ventura_13
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
n/a n/a≤ n/aenisa_euvdEU
АО «НППКТ» ОСОН ОСнова Оnyx≤ 2.10fstec_bduRU
АО «НТЦ ИТ РОСА» ROSA Virtualization≤ 2.1fstec_bduRU
ООО "Открытая мобильная платформа" ОС Аврора≤ 5.1.4fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Special Edition≤ 4.7fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Special Edition≤ 1.6 «Смоленск»fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Special Edition≤ 1.7fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Special Edition для «Эльбрус»≤ 8.1 «Ленинград»fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 10fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 12fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 11fstec_bduRU
Сообщество свободного программного обеспечения ncurses≤ 6.2.1fstec_bduRU
apple mac os x= 10.12.6nvdUScpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
apple macos= 11.7nvdUScpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
apple macos= 13.0nvdUScpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
invisible-island ncurses≤ 6.2.1nvdUScpe:2.3:a:invisible-island:ncurses:*:*:*:*:*:*:*:*

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2022-1846Apple macOS: Mehrere SchwachstellenDeutsch2022-10-24csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Apple macOS ausnutzen, um beliebigen Programmcode mit Administratorrechten auszuführen, beliebigen Programmcode auszuführen, seine Privilegien zu erweitern, einen Denial of Service Zustand herbeizuführen, Dateien zu manipulieren, Informationen offenzulegen, Sicherheitsvorkehrungen zu umgehen oder sonstige Auswirkungen zu verursachen.
WID-SEC-W-2023-1098NetApp ActiveIQ Unified Manager: Schwachstelle ermöglicht Manipulation von Dateien, Offenlegung von Informationen und DoSDeutsch2023-04-27csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in NetApp ActiveIQ Unified Manager ausnutzen, um vertrauliche Informationen offenzulegen, Daten zu manipulieren und einen Denial-of-Service-Zustand auszulösen.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd NVD CVE.org MITRE

published 2021-09-20modified 2026-10-08

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Related entries.

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+16123 more

references (45)

External citations — patches, advisories, analysis.

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