CVE-2019-18935

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2021-11-03. Federal remediation due 2022-05-03.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

99.74% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 100.0% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2019-12-11 00:00Z6 YR AGO

Last updated

2025-10-21 23:35Z10 MO AGO

Reserved

2019-11-13

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

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

Weaknesses

• CWE-502Deserialization of Untrusted DataBase

Data version

5.1

Document digest

ddb29d3e17de5e3ee81e5f35f21eb0205ed10002197b2ae0cdfa52630dd04c8e

• www.telerik.comhttps://www.telerik.com/support/whats-new/release-history
• codewhitesec.blogspot.comhttps://codewhitesec.blogspot.com/2019/02/telerik-revisited.html
• www.telerik.comhttps://www.telerik.com/support/kb/aspnet-ajax/details/allows-javascriptserializer-deserialization
• github.comhttps://github.com/bao7uo/RAU_crypto
• know.bishopfox.comhttps://know.bishopfox.com/research/cve-2019-18935-remote-code-execution-in-telerik-ui
• github.comhttps://github.com/noperator/CVE-2019-18935
• packetstormsecurity.comhttp://packetstormsecurity.com/files/155720/Telerik-UI-Remote-Code-Execution.html
• www.telerik.comhttps://www.telerik.com/support/whats-new/aspnet-ajax/release-history/ui-for-asp-net-ajax-r1-2020-%28version-2020-1-114%29
• packetstormsecurity.comhttp://packetstormsecurity.com/files/159653/Telerik-UI-ASP.NET-AJAX-RadAsyncUpload-Deserialization.html
• www.bleepingcomputer.comhttps://www.bleepingcomputer.com/news/security/us-federal-agency-hacked-using-old-telerik-bug-to-steal-data/
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-18935government-resource