What is CVE-2026-84852?
A security vulnerability has been detected in Reader Tools PDF Reader App 98.8 on Android. The affected element is the function ActSplashNew.handleDeeplink of the component File Handler. The manipulation of the argument _display_name leads to path traversal. An attack has to be approached locally. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
The record classifies CVE-2026-84852 under weakness class CWE-22. Its CVSS v3 base vector states that the flaw requires local access to the host, needs low-privilege credentials, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 33 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 4.4 — MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:P/RL:X/RC:R - CVSS v4.0 base score
- 4.8
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P - EPSS (FIRST)
- 0.1% probability of exploitation in the next 30 days, higher than 6.2% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 4.4/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2026-09-02
Is CVE-2026-84852 being exploited?
Weaponised exploit code for CVE-2026-84852 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. It currently carries a trending score of 39 in the Threadlinqs vulnerability feed.
- trickest/cve (trickest)
Affected products and versions
- Reader Tools: PDF Reader App
How to fix CVE-2026-84852
No vendor patch reference has been recorded for CVE-2026-84852 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.
Threat activity tracking CVE-2026-84852
No threat campaign in the Threadlinqs corpus currently references CVE-2026-84852, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.
Sources
Enriched from CVE.org, GitHub Security Advisories, FIRST EPSS, public proof-of-concept repositories. Last verified by Threadlinqs on .