Asterisk is an open source private branch exchange and telephony toolkit. From 21.0.0-pre1 until Asterisk 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 22.8-cert3, the chan_ooh323 Q.931 party-number parser lacks the CVE-2022-37325 fix because that fix was never forward-ported from Asterisk 20 to later versions. Malformed Q.931 elements in an OOH323 request can therefore crash Asterisk. This issue affects Asterisk versions greater than 20. The chan_ooh323 addon channel driver must be explicitly compiled and installed, which is not the default, and its port must be publicly reachable. This issue is fixed in Asterisk 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 22.8-cert3.
CVE-2026-57186
“—” beside the score: it is equal to the CVSS score beside it.
This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6% (48th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
Also known asEUVD-2026-111395 (ENISA EUVD)Source: ENISA EUVD
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 7.5
- EG Score
- 7.5HIGHmedium confidence
- EG Risk
- 49EG Risk 49/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity75% × 45%Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.6% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 0.6%
- EPSS %ILE
- 48th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.
- EG Severity
- 7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
- EG Likelihood
- 0.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-28). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
October 27, 2026
Last Modified
October 28, 2026
Advisory Details (10)
Auto-updated Oct 27, 2026CVE-2022-37325 fix is absent from current chan_ooh323 Q.931 party-number parser · Advisory · asterisk/asterisk · GitHub
https://github.com/asterisk/asterisk/security/advisories/GHSA-h5hv-jmgj-92q2Asterisk Release certified-22.8-cert3
Patch available: asterisk/asterisk certified-22.8-cert3
https://github.com/asterisk/asterisk/releases/tag/certified-22.8-cert3Asterisk Release 23.4.1
Patch available: asterisk/asterisk 23.4.1
https://github.com/asterisk/asterisk/releases/tag/23.4.1Asterisk Release 22.10.1
Patch available: asterisk/asterisk 22.10.1
https://github.com/asterisk/asterisk/releases/tag/22.10.1Asterisk Release 21.12.3
Patch available: asterisk/asterisk 21.12.3
https://github.com/asterisk/asterisk/releases/tag/21.12.3commit 62a7a7037b1a (asterisk/asterisk)
Fix landed in asterisk/asterisk commit 62a7a7037b1a — awaiting tagged release
https://github.com/asterisk/asterisk/commit/62a7a7037b1a145cabf95895b119cbae4d3c5a4fcommit 46c6c652d1de (asterisk/asterisk)
Fix landed in asterisk/asterisk commit 46c6c652d1de — awaiting tagged release
https://github.com/asterisk/asterisk/commit/46c6c652d1de9bfbb061fab0b1f681cf60660998commit 42d3552d2ac0 (asterisk/asterisk)
Fix landed in asterisk/asterisk commit 42d3552d2ac0 — awaiting tagged release
https://github.com/asterisk/asterisk/commit/42d3552d2ac0efbb68c9ec7ade898b6de0bfa033commit 0e776a837106 (asterisk/asterisk)
Fix landed in asterisk/asterisk commit 0e776a837106 — awaiting tagged release
https://github.com/asterisk/asterisk/commit/0e776a837106d5d0d14503a53388337931045164commit 07b9740cbc37 (asterisk/asterisk)
Fix landed in asterisk/asterisk commit 07b9740cbc37 — awaiting tagged release
https://github.com/asterisk/asterisk/commit/07b9740cbc371ffa7936cf368089fd073250ea7cWeakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 12× in last 7d / 12× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
- 2026-11-02 16:45 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-28 17:26 UTCEG score recompute
- 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-28 16:25 UTCEG score recompute
- 2026-10-27 22:28 UTCEG score recompute
- 2026-10-27 22:01 UTCENISA EUVD ID recordedEUVD-2026-111395 · Source: ENISA EUVD
- 2026-10-27 21:30 UTCEG score recomputeFirst assessed: 7.5 HIGH
- 2026-10-27 21:29 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(5)
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