EUVD-2026-37291Severity by source
AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
Remote web-delivered UXSS needs no privileges but requires a victim click (UI:R); scope changes across origins to disclose session data, with no integrity or availability impact.
Primary rating from Vendor (adobe).
CVSS VectorVendor: adobe
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
Lifecycle Timeline
2DescriptionCVE.org
Adobe Acrobat PDF Extension (Chrome) versions 26.5.2.2 and earlier are affected by a UXSS-class cross-origin data disclosure vulnerability. An attacker could exploit this vulnerability to gain access to data regarding the victim's session. Exploitation of this issue requires user interaction in that a victim must visit a maliciously crafted URL or interact with a compromised web page. Scope is changed.
AnalysisAI
Universal cross-site scripting (UXSS) in Adobe Acrobat PDF Extension for Chrome (versions 26.5.2.2 and earlier) allows remote attackers to disclose cross-origin session data when a victim visits a malicious URL or interacts with a compromised page. The CVSS 3.1 vector AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N indicates high confidentiality impact across security boundaries, and no public exploit identified at time of analysis. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Victim must (1) have Adobe Acrobat PDF Extension for Chrome version 26.5.2.2 or earlier installed and enabled in Chromium-based browser, and (2) actively visit a maliciously crafted URL or interact with a compromised web page (UI:R). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Signals are consistent but moderate. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker sends a phishing link or compromises a frequently visited site; when a victim running the vulnerable extension visits the page, attacker-controlled script triggers the UXSS condition in the extension's privileged context. The script then reads session-scoped data (cookies, tokens, or DOM content) from other origins the user is logged into - for example a webmail or SaaS tab - and exfiltrates it. … |
| Remediation | Patch available per vendor advisory: update the Adobe Acrobat PDF Extension for Chrome to a version newer than 26.5.2.2 via the Chrome Web Store (https://chromewebstore.google.com/detail/adobe-acrobat-pdf-edit-co/efaidnbmnnnibpcajpcglclefindmkaj); confirm auto-updates are enabled in chrome://extensions so endpoints pick up the fix without user action. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory Chrome deployments to identify users with Adobe Acrobat PDF Extension v26.5.2.2 or earlier installed. …
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