CVE-2018-20221: Secure/SAService.rem in Deltek Ajera Timesheets 9.10.16 and prior are vulnerable to remote code execution via

Q: How do I fix CVE-2018-20221?

ajera: upgrade to newer than 9.10.16. Exact commands for each OS are on this page.

Q: Is CVE-2018-20221 being exploited?

CVE-2018-20221 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2018-20221 affect?

CVE-2018-20221 affects ajera. Severity is high (CVSS 8.8). Secure/SAService.rem in Deltek Ajera Timesheets 9.10.16 and prior are vulnerable to remote code execution via deserialization of untrusted user input from an authenticated user. The executed code will run as the IIS Application Pool that is

Q: How urgent is CVE-2018-20221?

Priority 60/100. High severity; EPSS top 4%: very likely to be exploited; Public exploit reference

This week

HIGH 8.8UPGRADE

CVE-2018-20221 is a high-severity flaw (CVSS 8.8) affecting ajera. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Secure/SAService.rem in Deltek Ajera Timesheets 9.10.16 and prior are vulnerable to remote code execution via deserialization of untrusted user input from an authenticated user. The executed code will run as the IIS Application Pool that is running the application.

Why this priority

High severity
EPSS top 4%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	10.3% (top 4%)
CISA exploited list	No
Weakness	CWE-502
Published	2019-03-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: deltek

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-03-21 16:00 UTCPublished CVE record published
2026-06-17 01:52 UTCUpdated Record last modified

deltek ajera UPGRADE

Affected: <= 9.10.16

Fixed in: newer than 9.10.16

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ajera || rpm -q ajera || ajera --version

2. UPGRADE to newer than 9.10.16 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ajera

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ajera

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: Ajera Timesheets 9.10.16 - Deserialization of Untrusted Data

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-20221?

ajera: upgrade to newer than 9.10.16. Exact commands for each OS are on this page.

Is CVE-2018-20221 being exploited?

CVE-2018-20221 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-20221 affect?

CVE-2018-20221 affects ajera. Severity is high (CVSS 8.8). Secure/SAService.rem in Deltek Ajera Timesheets 9.10.16 and prior are vulnerable to remote code execution via deserialization of untrusted user input from an authenticated user. The executed code will run as the IIS Application Pool that is

How urgent is CVE-2018-20221?

Priority 60/100. High severity; EPSS top 4%: very likely to be exploited; Public exploit reference

References

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