CVE-2021-26837

Name: CVE-2021-26837
Creator: NVD / NIST
Published: 2023-09-19T00:15:33.093+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.85%

Last modified Jun 17, 2026

CVE-2021-26837 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. SQL Injection vulnerability in SearchTextBox parameter in Fortra (Formerly HelpSystems) DeliverNow before version 1.2.18, allows attackers to execute arbitrary code, escalate privileges, and gain sensitive information.. EPSS estimates a 0.85% chance of exploitation in the next 30 days.

Description

SQL Injection vulnerability in SearchTextBox parameter in Fortra (Formerly HelpSystems) DeliverNow before version 1.2.18, allows attackers to execute arbitrary code, escalate privileges, and gain sensitive information.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

0.85%

53.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-89

Affected Software

Vendor	Product	Versions
Fortra	Delivernow	< 1.2.18

References

https://community.helpsystems.com/knowledge-base/rjs/delivernow/overview/Third Party Advisory
https://susos.co/blog/f/cve-disclosure-sedric-louissaints-discovery-of-sql-injection-inExploit, Third Party Advisory
https://community.helpsystems.com/knowledge-base/rjs/delivernow/overview/Third Party Advisory
https://susos.co/blog/f/cve-disclosure-sedric-louissaints-discovery-of-sql-injection-inExploit, Third Party Advisory

Timeline

Published: Sep 19, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26837?

How severe is CVE-2021-26837?

CVE-2021-26837 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.85% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26837?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-26837?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST