CVE-2025-29953: Deserialization of Untrusted Data vulnerability in Apache ActiveMQ NMS OpenWire Client. This issue affects Ap

Q: How do I fix CVE-2025-29953?

activemq nms openwire: upgrade to 2.1.1. Exact commands for each OS are on this page.

Q: Is CVE-2025-29953 being exploited?

CVE-2025-29953 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-2025-29953 affect?

CVE-2025-29953 affects activemq nms openwire. Severity is critical (CVSS 9.8). Deserialization of Untrusted Data vulnerability in Apache ActiveMQ NMS OpenWire Client. This issue affects Apache ActiveMQ NMS OpenWire Client before 2.1.1 when performing connections to untrusted servers. Such servers could abuse the unbo

Q: How urgent is CVE-2025-29953?

Priority 68/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action; On your watchlist

This week

CRITICAL 9.8REMOTEWATCHLISTUPGRADE

CVE-2025-29953 is a critical-severity flaw (CVSS 9.8) affecting activemq nms openwire. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Deserialization of Untrusted Data vulnerability in Apache ActiveMQ NMS OpenWire Client. This issue affects Apache ActiveMQ NMS OpenWire Client before 2.1.1 when performing connections to untrusted servers. Such servers could abuse the unbounded deserialization in the client to provide malicious responses that may eventually cause arbitrary code execution on the client. Version 2.1.0 introduced a allow/denylist feature to restrict deserialization

Why this priority

Critical severity
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Weakness	CWE-502
Published	2025-04-18
Last modified	2026-06-17

Publisher (CNA): Apache Software Foundation · Vendor: apache

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

Am I affected?

Timeline

2025-04-18 16:15 UTCPublished CVE record published
2026-06-17 09:05 UTCUpdated Record last modified

apache activemq nms openwire UPGRADE

Affected: < 2.1.1

Fixed in: 2.1.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy activemq-nms-openwire || rpm -q activemq-nms-openwire || activemq-nms-openwire --version

2. UPGRADE to 2.1.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade activemq-nms-openwire

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade activemq-nms-openwire

Note

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

Exact fixes by distribution

NuGet (.NET) · Apache.NMS.ActiveMQ · FIXED · 2.1.1 · vulnerable: < 2.1.1 · source

dotnet add package Apache.NMS.ActiveMQ --version 2.1.1

Fedora ELN · ibus-typing-booster · FIXED · 2.31.3-1.eln159 · FEDORA-2026-c895c68d60 · source

sudo dnf upgrade --advisory=FEDORA-2026-c895c68d60

Fedora 46 · perl-WWW-OrangeHRM-Client · FIXED · 0.12.0-21.fc46 · FEDORA-2026-2d14efca09 · source

sudo dnf upgrade --advisory=FEDORA-2026-2d14efca09

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-2025-29953?

activemq nms openwire: upgrade to 2.1.1. Exact commands for each OS are on this page.

Is CVE-2025-29953 being exploited?

CVE-2025-29953 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-2025-29953 affect?

CVE-2025-29953 affects activemq nms openwire. Severity is critical (CVSS 9.8). Deserialization of Untrusted Data vulnerability in Apache ActiveMQ NMS OpenWire Client. This issue affects Apache ActiveMQ NMS OpenWire Client before 2.1.1 when performing connections to untrusted servers. Such servers could abuse the unbo

How urgent is CVE-2025-29953?

Priority 68/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Apache ActiveMQ vulnerabilities

References

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