CVE-2026-118040— Improper Signature and Certificate Validation in Telerik Document Processing Libraries RadPdfProcessing

Quick assessment

Affected

Progress Software Telerik Document Processing Libraries

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在版本 2026.3.1027 之前的 In Progress® Telerik® 文档处理库中，RadPdfProcessing 的数字签名验证功能存在加密签名验证不当和证书验证不当的问题。这允许未认证的攻击者通过精心构造的已签名 PDF 文档，使签名验证错误地将伪造内容报告为未修改，并将其签名证书报告为有效。

CVSS 7.5 · High Updated Oct 28, 2026

Possible ATT&CK Techniques 3 AI

T1566 · Phishing T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing Application

Get alerts for future matching vulnerabilities Log in to subscribe

Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title

Improper Signature and Certificate Validation in Telerik Document Processing Libraries RadPdfProcessing

Source: CVE Program / CVE List V5

Vulnerability Description

In Progress® Telerik® Document Processing Libraries prior to version 2026.3.1027, improper verification of cryptographic signatures and improper certificate validation in RadPdfProcessing digital signature validation allow an unauthenticated attacker to cause signature validation to report forged content as unmodified and its signing certificate as valid via a crafted signed PDF document.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

密码学签名的验证不恰当

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Progress Software	Telerik Document Processing Libraries	0 ~ 2026.3.1027	-

II. Public POCs for CVE-2026-118040

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-118040

请登录查看更多情报信息。

Other References for CVE-2026-118040 (1)

https://docs.telerik.com/devtools/document-processing/knowledge-base/kb-security-improper-verification-of-cryptographic-signature-cve-2026-118040 vendor-advisory

https://www.cve.org/CVERecord?id=CVE-2026-118040

Same Patch Batch · Progress Software · 2026-10-28 · 6 CVEs total

CVE-2026-118036	7.5 HIGH	Uncontrolled Resource Consumption in Telerik Document Processing Libraries RadPdfProcessin
CVE-2026-118035	7.5 HIGH	Uncontrolled Resource Consumption in Telerik Document Processing Libraries RadWordsProcess
CVE-2026-118039	7.5 HIGH	XML External Entity Reference in Telerik Document Processing Libraries SVG Image Processin
CVE-2026-118037	7.5 HIGH	Uncontrolled Resource Consumption in Telerik Document Processing Libraries RadSpreadProces
CVE-2026-118038	7.1 HIGH	Path Traversal in Telerik Document Processing Libraries AI Agent Tools

IV. Related Vulnerabilities

Same product: Telerik Document Processing Libraries

Same vendor: Progress Software

Same weakness: CWE-347