CVE-2025-47780: Asterisk is an open-source private branch exchange (PBX)

Q: How do I fix CVE-2025-47780?

asterisk: upgrade to 18.26.2, 20.14.1, 21.9.1, 22.4.1; certified asterisk: upgrade to 18.9. Exact commands for each OS are on this page.

Q: Is CVE-2025-47780 being exploited?

CVE-2025-47780 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-2025-47780 affect?

CVE-2025-47780 affects asterisk, certified asterisk. Severity is high (CVSS 7.8). Asterisk is an open-source private branch exchange (PBX). Prior to versions 18.26.2, 20.14.1, 21.9.1, and 22.4.1 of Asterisk and versions 18.9-cert14 and 20.7-cert5 of certified-asterisk, trying to disallow shell commands to be run via the

Q: How urgent is CVE-2025-47780?

Priority 37/100. High severity; Public exploit reference

Routine

HIGH 7.8UPGRADEUPGRADE

CVE-2025-47780 is a high-severity flaw (CVSS 7.8) affecting asterisk, certified asterisk. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Asterisk is an open-source private branch exchange (PBX). Prior to versions 18.26.2, 20.14.1, 21.9.1, and 22.4.1 of Asterisk and versions 18.9-cert14 and 20.7-cert5 of certified-asterisk, trying to disallow shell commands to be run via the Asterisk command line interface (CLI) by configuring `cli_permissions.conf` (e.g. with the config line `deny=!*`) does not work which could lead to a security risk. If an administrator running an Asterisk insta

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 80%)
CISA exploited list	No
Weakness	CWE-78
Published	2025-05-22
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: sangoma

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

Am I affected?

Timeline

2025-05-22 17:15 UTCPublished CVE record published
2026-06-17 09:28 UTCUpdated Record last modified

sangoma asterisk UPGRADE

Affected: < 18.26.2 · >= 20.0.0 and < 20.14.1 · >= 21.0.0 and < 21.9.1 · >= 22.0.0 and < 22.4.1

Fixed in: 18.26.2, 20.14.1, 21.9.1, 22.4.1

Safe to downgrade to: a release before 20.0.0

1. Check installed version

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

2. UPGRADE to 18.26.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade asterisk

Note

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

3. If no update is available yet, DOWNGRADE to a release before 20.0.0 (Debian / Ubuntu)

apt-cache madison asterisk sudo apt install asterisk=<VERSION_BEFORE_20.0.0> sudo apt-mark hold asterisk

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list asterisk sudo dnf downgrade asterisk-<VERSION_BEFORE_20.0.0> sudo dnf versionlock add asterisk

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

sangoma certified asterisk UPGRADE

Affected: < 18.9 · 18.9 · 18.9 cert1 · 18.9 cert1-rc1 · 18.9 cert10 · 18.9 cert11 · 18.9 cert12 · 18.9 cert13

Fixed in: 18.9

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy certified-asterisk || rpm -q certified-asterisk || certified-asterisk --version

2. UPGRADE to 18.9 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade certified-asterisk

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade certified-asterisk

Note

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

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-2025-47780?

asterisk: upgrade to 18.26.2, 20.14.1, 21.9.1, 22.4.1; certified asterisk: upgrade to 18.9. Exact commands for each OS are on this page.

Is CVE-2025-47780 being exploited?

CVE-2025-47780 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-2025-47780 affect?

CVE-2025-47780 affects asterisk, certified asterisk. Severity is high (CVSS 7.8). Asterisk is an open-source private branch exchange (PBX). Prior to versions 18.26.2, 20.14.1, 21.9.1, and 22.4.1 of Asterisk and versions 18.9-cert14 and 20.7-cert5 of certified-asterisk, trying to disallow shell commands to be run via the

How urgent is CVE-2025-47780?

Priority 37/100. High severity; Public exploit reference

Related CVEs

CVE-2025-1131 HIGH 7.8 UPGRADE DOWNGRADE A local privilege escalation vulnerability exists in the safe_asterisk script included with the Asterisk toolk
CVE-2026-23741 NONE 0.0 UPGRADE UPGRADE Asterisk is an open source private branch exchange and telephony toolkit
CVE-2026-23740 NONE 0.0 DOWNGRADE UPGRADE Asterisk is an open source private branch exchange and telephony toolkit
CVE-2026-23739 LOW 2.0 UPGRADE UPGRADE Asterisk is an open source private branch exchange and telephony toolkit
CVE-2026-23738 LOW 3.5 UPGRADE UPGRADE Asterisk is an open source private branch exchange and telephony toolkit

References

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