CVE-2026-57197

HIGHPre-NVD 7.77.7
EchelonGraph scoreLOW confidence

This high-severity CVE scores 7.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (44th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-111110 (ENISA EUVD)Source: ENISA EUVD

7.7EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.7Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Asterisk is an open source private branch exchange and telephony toolkit. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, an unbounded memcpy of OGG/Speex packet data in format_ogg_speex can cause a heap buffer overflow and crash Asterisk when reading a file containing corrupted Speex audio. The attacker must create the file and make it available to Asterisk either through sufficiently elevated privileges or by convincing an Asterisk administrator to make it available. Asterisk must also be configured to play that file. This issue is fixed in Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3.

CVSS v3
7.7
EG Score
7.7HIGHlow confidence
EG Risk
35
EG Risk 35/100

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)
Severity77% × 45%
Impact severity (EG Severity): CVSS 7.7 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0% × 40%
No KEV listing, EG-KEV tier or EPSS when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CVSS v4.0 confidentiality and integrity impact both High). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from 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.
EPSS PROB
0.5%
EPSS %ILE
44th
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 (7.7): severity, escalated by confirmed exploitation. This CVE's 7.7 is its impact severity (EG Severity), not escalated.

EG Severity
7.7 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
0.5% within 30 daysSource: FIRST EPSS. 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; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade 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; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CVSS v4.0 confidentiality and integrity impact both High). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from 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; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CVSS v4.0 confidentiality and integrity impact both High). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” 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, 2026
Patch available. Sources: github, github_commit, github_release.
GitHub release Patch Available

Asterisk Release 21.12.3

Patch available: asterisk/asterisk 21.12.3

https://github.com/asterisk/asterisk/releases/tag/21.12.3
GitHub release Patch Available

Asterisk Release 20.20.1

Patch available: asterisk/asterisk 20.20.1

https://github.com/asterisk/asterisk/releases/tag/20.20.1
GitHub commit

commit dbcf38933866 (asterisk/asterisk)

Fix landed in asterisk/asterisk commit dbcf38933866 — awaiting tagged release

https://github.com/asterisk/asterisk/commit/dbcf38933866f0ddd023bc1814a78d4c750b0809
GitHub commit

commit ccec146953b5 (asterisk/asterisk)

Fix landed in asterisk/asterisk commit ccec146953b5 — awaiting tagged release

https://github.com/asterisk/asterisk/commit/ccec146953b5e13043a36663af84e5a50ca633a6
GitHub commit

commit 336ebe762bf6 (asterisk/asterisk)

Fix landed in asterisk/asterisk commit 336ebe762bf6 — awaiting tagged release

https://github.com/asterisk/asterisk/commit/336ebe762bf6dfaf279796700de8ab51f7acd2f3
GitHub commit

commit 29026ece6fdd (asterisk/asterisk)

Fix landed in asterisk/asterisk commit 29026ece6fdd — awaiting tagged release

https://github.com/asterisk/asterisk/commit/29026ece6fdd1834bb8f49c013ef163745ff2bbd
GitHub commit

commit 1cf189549994 (asterisk/asterisk)

Fix landed in asterisk/asterisk commit 1cf189549994 — awaiting tagged release

https://github.com/asterisk/asterisk/commit/1cf189549994e0898954c814ce5a023cd969f1db
GitHub commit

commit 0e6d761ed83f (asterisk/asterisk)

Fix landed in asterisk/asterisk commit 0e6d761ed83f — awaiting tagged release

https://github.com/asterisk/asterisk/commit/0e6d761ed83f1671632c91805252767eae85e1a2
GitHub commit

commit 0a2c1d9e910f (asterisk/asterisk)

Fix landed in asterisk/asterisk commit 0a2c1d9e910f — awaiting tagged release

https://github.com/asterisk/asterisk/commit/0a2c1d9e910f7c4dfffa05e328accb8a96990df8
GitHub advisoryMentions a patch (unverified)

Heap Buffer Overflow in OGG/Speex File Playback (format_ogg_speex) · Advisory · asterisk/asterisk · GitHub

https://github.com/asterisk/asterisk/security/advisories/GHSA-8jhw-m2hg-vp3h

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 10× 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.

  1. 2026-11-02 16:45 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  2. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  3. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  4. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  5. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  6. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  7. 2026-10-27 17:26 UTCEG score recompute
  8. 2026-10-27 17:01 UTCENISA EUVD ID recordedEUVD-2026-111110 · Source: ENISA EUVD
  9. 2026-10-27 16:42 UTCEG score recomputeFirst assessed: 7.7 HIGH
  10. 2026-10-27 16:39 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-57197?
CVE-2026-57197 is a high-severity vulnerability; its CVE record was published on October 27, 2026. Asterisk is an open source private branch exchange and telephony toolkit. Prior to Asterisk 20.20.1, 21.12.3, 22.10.1, 23.4.1 and Certified Asterisk 20.7-cert11, 22.8-cert3, an unbounded memcpy of OGG/Speex packet data in format_ogg_speex can cause a heap buffer overflow and crash Asterisk when…
When was the CVE record for CVE-2026-57197 published?
The CVE record for CVE-2026-57197 was published on October 27, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 28, 2026; the record at its source may have been updated since.
Is CVE-2026-57197 actively exploited?
CVE-2026-57197 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (44th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-57197?
CVE-2026-57197 has a CVSS base score of 7.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-57197?
A fix for CVE-2026-57197 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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