CVSS v3
7.8
HIGH
EPSS Score
68.7%
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
An exploitable return of stack variable address vulnerability exists in the JavaScript implementation of Nitro Pro PDF. A specially crafted document can cause a stack variable to go out of scope, resulting in the application dereferencing a stale pointer. This can lead to code execution under the context of the application. An attacker can convince a user to open a document to trigger the vulnerability.
An exploitable return of stack variable address vulnerability exists in the JavaScript implementation of Nitro Pro PDF. A specially crafted document can cause a stack variable to go out of scope, resulting in the application dereferencing a stale pointer. This can lead to code execution under the context of the application. An attacker can convince a user to open a document to trigger the vulnerability.
Active exploitation of CVE-2021-21798 has not been confirmed. The EPSS score is 68.7%, indicating the estimated probability of exploitation in the next 30 days.
CVE-2021-21798 has a CVSS v3 base score of 7.8 (HIGH severity).
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Ranked by exploit probability (EPSS).