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CVE mentions, exploit signals, and PoC evidence in one fast public view.

CVE detail

CVE-2021-21796

An exploitable use-after-free vulnerability exists in the JavaScript implementation of Nitro Pro PDF. A specially crafted document can cause an object containing the path to a document to be destroyed and then later reused, resulting in a use-after-free vulnerability, which can lead to code execution under the context of the application. An attacker can convince a user to open a document to trigger this vulnerability.

CVSS 7.8 · HighBuzz score 11.9

Buzz score

Why this CVE is surfacing

Buzz score total 11.9

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 6.9 · diversity 5.0 · KEV 0.0 · OTX 0.0 · PoC 0.0
Mention score
6.9
1 evidence mentions in the snapshot
Diversity score
5.0
1 sources across 1 categories
KEV score
0.0
No KEV entry observed
OTX score
0.0
0 OTX pulses
PoC score
0.0
0 repos · best confidence N/A
Best PoC traction
0
Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions
0
within the 30d window
Peak daily
0
highest bucket

Evidence

Source links by recency

Newest mentions first
1 source links · newest first
  • 18th October – Threat Intelligence ReportCheck Point Research

    For the latest discoveries in cyber research for the week of 18th October, please download our Threat Intelligence Bulletin. Top Attacks and Breaches Israeli Medical Center Hillel Yaffe has been targeted by ransomware affecting the hospital’s computer systems, which have been working in a limited capacity since the attack occurred. Russia-based group TA505 is running […]

    vendorresearch.checkpoint.comOct 18, 2021, 3:53 PM

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

0 repository references · best confidence N/A · max 0 stars
No public PoC repositories have been matched yet.

Related records

Similar CVEs

6 related CVEs with shared weakness or product evidence
  • CVE-2020-6115

    An exploitable vulnerability exists in the cross-reference table repairing functionality of Nitro Software, Inc.’s Nitro Pro 13.13.2.242. While searching for an object identifier…

    CVSS 7.8 · High
  • CVE-2020-6074

    An exploitable code execution vulnerability exists in the PDF parser of Nitro Pro 13.9.1.155. A specially crafted PDF document can cause a use-after-free which can lead to remote…

    CVSS 8.8 · High
    2 mentions
  • CVE-2026-58185

    The Apache Traffic Server intercept plugin has a use-after-free. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 throug…

    CVSS 8.2 · High
    1 mention
  • CVE-2026-58164

    Apache Traffic Server has use-after-free and time-of-check/time-of-use errors in remap configuration handling. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9,…

    CVSS 8.3 · High
    1 mention
  • CVE-2026-50738

    A use-after-free condition exists in pglogical's worker signaling code, where a worker structure can be dereferenced after the underlying slot has been freed or recycled during no…

    CVSS 7.7 · High
    1 mention
  • CVE-2026-54620

    sqlite3 provides Ruby bindings for the SQLite3 embedded database. From 2.1.0 to 2.9.4, the callbacks used for SQLite aggregate functions can be freed while still referenced during…

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    4 mentions