Skip to main content
ExploitedIn CISA KEVFix available

CVE-2019-18935

Exploitation confirmed. First attested on 2021-11-03 by CISA-ADP, CISA KEV, GCVE · kevintel, GCVE · shadowserver.

  • Published2019-12-11
  • WeaknessCWE-502

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Progress Telerik UI for ASP.NET AJAX through 2019.3.1023 contains a .NET deserialization vulnerability in the RadAsyncUpload function. This is exploitable when the encryption keys are known due to the presence of CVE-2017-11317 or CVE-2017-11357, or other means. Exploitation can result in remote code execution. (As of 2020.1.114, a default setting prevents the exploit. In 2019.3.1023, but not earlier versions, a non-default setting can prevent exploitation.)

Timeline

dates in UTC
  1. 2019-12-1113:15CVE publishedNVD
  2. 2019-12-18Exploit-DB entryExploit-DB
  3. 2021-11-03Added to the CISA KEV catalogCISA KEV
  4. 2021-11-03Listed as exploited by GCVEGCVE
  5. 2021-11-03Exploitation first reportedCISA KEV
  6. 2025-02-0420:02SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-18935?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-18935?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Telerik ui for asp.net ajax
BranchAffectedFixed in
2020.1≥ 2011.1.315, ≤ 2020.1.114no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • ICSA-21-077-03 CISA1 known affected

    Hitachi ABB Power Grids eSOMS Telerik

    eSOMS: all versions prior to 6.3 using a version of Telerik software

Full record on NVD

Fix

  1. CISA’s required action: Apply updates per vendor instructions.due 2022-05-03
  2. Vendor fix CISA ICSA-21-077-03 · 1 productHitachi ABB Power Grids has published an advisory for eSOMS Telerik and advises users to update to eSOMS Version 6.3 as soon as possible.
  3. Mitigation from the vendor CISA ICSA-21-077-03 · 1 productFor additional information and support, contact a product provider or Hitachi ABB Power Grids service organization. For contact information, visit Hitachi ABB Power Grids contact-centers.
  4. Mitigation from the vendor CISA ICSA-21-077-03 · 1 productRecommended security practices and firewall configurations can help protect a process control network from attacks that originate from outside the network. Such practices include ensuring applications and servers are physically protected from direct access by unauthorized personnel, have no direct …

Advisories and patches

Detection

read 2026-11-02 22:42 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
EDB-47793
Exploit-DB
Proof-of-concept repositories
17 repositories, unverifiedbao7uo/RAU_cryptonoperator/CVE-2019-18935becrevex/Telerik_CVE-2019-18935ThanHuuTuan/Telerik_CVE-2019-18935ThanHuuTuan/CVE_2019_18935
PoC-in-GitHub
Metasploit modules
1 moduleexploit/windows/http/telerik_rau_deserializationrank: excellentModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2021-11-03
Patch Due Date
2022-05-03
Ransomware Use
Known
Required Action
Apply updates per vendor instructions.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2019-12-11
Last Modified
2026-06-17
NVD status
Analyzed
GitHub Advisory
GHSA-c655-3j45-33xw

Frequently asked questions

What is CVE-2019-18935?

Progress Telerik UI for ASP.NET AJAX through 2019.3.1023 contains a .NET deserialization vulnerability in the RadAsyncUpload function. This is exploitable when the encryption keys are known due to the presence of CVE-2017-11317 or CVE-2017-11357, or other means. Exploitation can result in remote code execution. (As of 2020.1.114, a default setting prevents the exploit. In 2019.3.1023, but not earlier versions, a non-default setting can prevent exploitation.)

Is CVE-2019-18935 actively exploited?

Yes. CVE-2019-18935 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-05-03.

What is the CVSS score for CVE-2019-18935?

CVE-2019-18935 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Hear about the next vulnerability in your software

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, November 2021Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record