How severe is CVE-2021-21056?

CVE-2021-21056 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-21056 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 21% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-21056?

CVE-2021-21056 affects Adobe Framemaker. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-21056?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-21056 published?

CVE-2021-21056 was published on 2021-03-12 and last updated on 2026-06-17.

CVE-2021-21056

CVE-2021-21056 is a high-severity vulnerability in Adobe Framemaker with a CVSS 3.x base score of 7.8. Its EPSS exploit-prediction score of 21% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-125.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 9.3
EPSS exploit prediction: 21% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Adobe Framemaker
Published: 2021-03-12
Last modified: 2026-06-17

Description

Adobe Framemaker version 2020.0.1 (and earlier) is affected by an Out-of-bounds Read vulnerability when parsing a specially crafted file. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Frequently asked questions

What is CVE-2021-21056?: Adobe Framemaker version 2020.0.1 (and earlier) is affected by an Out-of-bounds Read vulnerability when parsing a specially crafted file. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
How severe is CVE-2021-21056?: CVE-2021-21056 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-21056 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 21% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-21056?: CVE-2021-21056 affects Adobe Framemaker. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-21056?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-21056 published?: CVE-2021-21056 was published on 2021-03-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:adobe:framemaker:*:*:*:*:*:*:*:*

More vulnerabilities in Adobe Framemaker

CVE-2020-3740 — Critical (CVSS 9.8): Adobe Framemaker versions 2019.0.4 and below have a memory corruption vulnerability. Successful exploitation could lead…
CVE-2020-9636 — High (CVSS 8.8): Adobe Framemaker versions 2019.0.5 and below have a memory corruption vulnerability. Successful exploitation could lead…
CVE-2020-9635 — High (CVSS 8.8): Adobe Framemaker versions 2019.0.5 and below have an out-of-bounds write vulnerability. Successful exploitation could…
CVE-2020-9634 — High (CVSS 8.8): Adobe Framemaker versions 2019.0.5 and below have an out-of-bounds write vulnerability. Successful exploitation could…
CVE-2020-3739 — High (CVSS 8.8): Adobe Framemaker versions 2019.0.4 and below have a memory corruption vulnerability. Successful exploitation could lead…
CVE-2020-3738 — High (CVSS 8.8): Adobe Framemaker versions 2019.0.4 and below have an out-of-bounds write vulnerability. Successful exploitation could…

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Other CWE-125 (Out-of-bounds Read) vulnerabilities

CVE-2026-24826 — Critical (CVSS 10.0): Out-of-bounds Write, Divide By Zero, NULL Pointer Dereference, Use of Uninitialized Resource, Out-of-bounds Read,…
CVE-2024-22004 — Critical (CVSS 10.0): Due to length check, an attacker with privilege access on a Linux Nonsecure operating system can trigger a…
CVE-2021-41556 — Critical (CVSS 10.0): sqclass.cpp in Squirrel through 2.2.5 and 3.x through 3.1 allows an out-of-bounds read (in the core interpreter) that…
CVE-2021-21777 — Critical (CVSS 10.0): An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer…
CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
CVE-2013-0767 — Critical (CVSS 10.0): The nsSVGPathElement::GetPathLengthScale function in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and…

Browse all CWE-125 (Out-of-bounds Read) vulnerabilities →