HOME VULNERABILITIESCVE-2022-26498

HIGH

CVE-2022-26498

CWE-400Published: April 15, 2022· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

An issue was discovered in Asterisk through 19.x. When using STIR/SHAKEN, it is possible to download files that are not certificates. These files could be much larger than what one would expect to download, leading to Resource Exhaustion. This is fixed in 16.25.2, 18.11.2, and 19.3.2.

Technical Analysis

CVE-2022-26498 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Affected Vendors & Products

Debian1 product(s)

debian linux

digium1 product(s)

asterisk

Source: NVD CPE · 3 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time

Offensive Security exploit database

GitHub PoC Search

Community PoC repositories

Rapid7 / Metasploit

Metasploit module search

Security advisories & exploits

Official NIST entry

CVE Program entry

External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://packetstormsecurity.com/files/166744/Asterisk-Project-Security-Advisory-AST-2022-001.html

PATCHhttps://downloads.asterisk.org/pub/security/AST-2022-001.html

PATCHhttp://packetstormsecurity.com/files/166744/Asterisk-Project-Security-Advisory-AST-2022-001.html

PATCHhttps://downloads.asterisk.org/pub/security/AST-2022-001.html

ADVISORYhttps://downloads.asterisk.org/pub/security/

ADVISORYhttps://lists.debian.org/debian-lts-announce/2022/11/msg00021.html

ADVISORYhttps://www.debian.org/security/2022/dsa-5285

ADVISORYhttps://downloads.asterisk.org/pub/security/

ADVISORYhttps://lists.debian.org/debian-lts-announce/2022/11/msg00021.html

ADVISORYhttps://www.debian.org/security/2022/dsa-5285

All References (12)

→

http://packetstormsecurity.com/files/166744/Asterisk-Project-Security-Advisory-AST-2022-001.htmlPatch · Third Party Advisory · VDB Entry

→

http://packetstormsecurity.com/files/172139/Shannon-Baseband-chatroom-SDP-Attribute-Memory-Corruption.html

→

https://downloads.asterisk.org/pub/security/Vendor Advisory

→

https://downloads.asterisk.org/pub/security/AST-2022-001.htmlPatch · Vendor Advisory

→

https://lists.debian.org/debian-lts-announce/2022/11/msg00021.htmlMailing List · Third Party Advisory

→

https://www.debian.org/security/2022/dsa-5285Third Party Advisory

→

http://packetstormsecurity.com/files/166744/Asterisk-Project-Security-Advisory-AST-2022-001.htmlPatch · Third Party Advisory · VDB Entry

→

http://packetstormsecurity.com/files/172139/Shannon-Baseband-chatroom-SDP-Attribute-Memory-Corruption.html

→

https://downloads.asterisk.org/pub/security/Vendor Advisory

→

https://downloads.asterisk.org/pub/security/AST-2022-001.htmlPatch · Vendor Advisory

→

https://lists.debian.org/debian-lts-announce/2022/11/msg00021.htmlMailing List · Third Party Advisory

→

https://www.debian.org/security/2022/dsa-5285Third Party Advisory

Quick Facts

CVE IDCVE-2022-26498

CVSS Score7.5 / 10

SeverityHIGH

WeaknessCWE-400

CISA KEVNo

Affected2 vendor(s)

PublishedApr 15, 2022

Related CVEs (CWE-400)

Recommended Actions

→Apply vendor patches immediately
→Monitor CVE-2022-26498 in threat intel feeds
→Review IDS/IPS signatures for exploitation attempts

Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.

← All Vulnerabilities·Search for CVE-2022-26498·NVD