CVE-2026-84975

HIGHPre-NVD 7.47.4
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 7.4 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (14th 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: EPSS, a secondary CVSS source

Also known asEUVD-2026-83197 (ENISA EUVD)Source: ENISA EUVD

7.4EG
EchelonGraph verdictPlan mitigationNo release containing the referenced fix is confirmed: check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.4Exploit: None knownExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

PJSIP is a free and open source multimedia communication library written in C. In 2.17 and earlier, the OpenSSL and GnuTLS backends in pjlib/src/pj/ssl_sock_ossl.c and pjlib/src/pj/ssl_sock_gtls.c copy DNS SubjectAltName values with string functions that recalculate their length and truncate an embedded NUL byte. With server verification enabled through --tls-verify-server for the PJSIP TLS/SIPS transport, a certificate containing a DNS SubjectAltName formed from the target hostname prefix followed by an embedded NUL and an attacker-controlled suffix can therefore be accepted for the prefix hostname. An attacker who possesses such a certificate from a trusted issuer and can intercept the connection can impersonate the target server, complete the SIP session, and receive REGISTER credentials. The mbedTLS backend is not affected because it preserves the explicit string length. No fixed version is available as of this review.

CVSS v3
7.4
EG Score
7.4HIGHmedium confidence
EG Risk
33
EG Risk 33/100

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)
Severity74% × 45%
Impact severity (EG Severity): CVSS 7.4 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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 referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.
EPSS PROB
0.2%
EPSS %ILE
14th
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 (7.4): severity, escalated by confirmed exploitation. This CVE's 7.4 is its impact severity (EG Severity), not escalated.

EG Severity
7.4 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
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-09). 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.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.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 referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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; Fix on system upgrade if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (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

September 18, 2026

Last Modified

October 20, 2026

Advisory Details (2)

Auto-updated Sep 18, 2026
Fix referenced — no release confirmed yet. Sources: github, github_commit.
GitHub commit

commit 43d3bd77bb68 (pjsip/pjproject)

Fix landed in pjsip/pjproject commit 43d3bd77bb68 — awaiting tagged release

https://github.com/pjsip/pjproject/commit/43d3bd77bb6833eab4c493503b8d564a754ddfdd
GitHub advisoryMentions a patch (unverified)

TLS server identity (hostname) verification bypass via embedded NUL in certificate SubjectAltName (OpenSSL and GnuTLS backends) · Advisory · pjsip/pjproject · GitHub

https://github.com/pjsip/pjproject/security/advisories/GHSA-382p-87mh-r3q8

Affected Packages

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
asterisk0.1.11-3 ... 1:22.9.0+dfsg+~cs6.16.60671434-1 (296 versions)
  • every version on: no fix on record
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 29× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

  1. 2026-11-13 16:57 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  2. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  3. 2026-11-11 16:41 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  4. 2026-11-10 16:45 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  5. 2026-11-09 17:40 UTCEchelonGraph re-scored
  6. 2026-11-09 16:36 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  7. 2026-11-08 16:41 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  8. 2026-11-07 16:40 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  9. 2026-11-06 16:39 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  10. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  11. 2026-11-04 16:37 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  12. 2026-11-03 16:49 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  13. 2026-11-03 06:46 UTCEchelonGraph re-scored
  14. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  15. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  16. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  17. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  18. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  19. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  20. 2026-10-27 19:51 UTCEchelonGraph re-scored
  21. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  22. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  23. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  24. 2026-10-25 13:55 UTCEchelonGraph re-scored
  25. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
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  1. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  2. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  3. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  4. 2026-10-20 20:06 UTCEchelonGraph re-scored
  5. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  6. 2026-10-19 17:05 UTCEchelonGraph re-scored
  7. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  8. 2026-10-18 03:06 UTCEchelonGraph re-scored
  9. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  10. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  11. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  12. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  13. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  14. 2026-10-13 05:32 UTCEchelonGraph re-scored
  15. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  16. 2026-10-12 14:53 UTCEchelonGraph re-scored
  17. 2026-10-11 19:18 UTCEchelonGraph re-scored
  18. 2026-10-11 16:34 UTCEchelonGraph re-scored
  19. 2026-10-11 13:52 UTCEchelonGraph re-scored
  20. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  21. 2026-10-11 05:52 UTCEchelonGraph re-scored
  22. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  23. 2026-10-10 05:56 UTCEchelonGraph re-scored
  24. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  25. 2026-10-08 17:58 UTCEchelonGraph re-scored
  26. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  27. 2026-10-08 05:59 UTCEchelonGraph re-scored
  28. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  29. 2026-10-06 17:26 UTCEchelonGraph re-scored
  30. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  31. 2026-10-06 05:29 UTCEchelonGraph re-scored
  32. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 12th percentile
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  34. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  35. 2026-10-03 17:36 UTCEchelonGraph re-scored
  36. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  37. 2026-10-03 05:39 UTCEchelonGraph re-scored
  38. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  39. 2026-10-02 05:42 UTCEchelonGraph re-scored
  40. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  41. 2026-09-30 17:49 UTCEchelonGraph re-scored
  42. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  43. 2026-09-30 00:25 UTCEchelonGraph re-scored
  44. 2026-09-29 09:08 UTCEchelonGraph re-scored
  45. 2026-09-28 21:09 UTCEchelonGraph re-scored
  46. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  47. 2026-09-27 21:14 UTCEchelonGraph re-scored
  48. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  49. 2026-09-26 21:18 UTCEchelonGraph re-scored
  50. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  51. 2026-09-26 09:19 UTCEchelonGraph re-scored
  52. 2026-09-24 21:24 UTCEchelonGraph re-scored
  53. 2026-09-24 21:12 UTCEchelonGraph re-scored
  54. 2026-09-24 18:01 UTCEchelonGraph re-scored
  55. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  56. 2026-09-23 18:03 UTCEchelonGraph re-scored
  57. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  58. 2026-09-22 18:08 UTCEchelonGraph re-scored
  59. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  60. 2026-09-22 06:10 UTCEchelonGraph re-scored
  61. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  62. 2026-09-21 06:15 UTCEchelonGraph re-scored
  63. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  64. 2026-09-19 18:22 UTCEchelonGraph re-scored
  65. 2026-09-18 18:27 UTCEchelonGraph re-scored
  66. 2026-09-18 17:19 UTCEchelonGraph re-scoredFirst assessed: 7.4 HIGH
  67. 2026-09-18 17:19 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-84975?
CVE-2026-84975 is a high-severity vulnerability; its CVE record was published on September 18, 2026. PJSIP is a free and open source multimedia communication library written in C. In 2.17 and earlier, the OpenSSL and GnuTLS backends in pjlib/src/pj/ssl_sock_ossl.c and pjlib/src/pj/ssl_sock_gtls.c copy DNS SubjectAltName values with string functions that recalculate their length and truncate an…
When was the CVE record for CVE-2026-84975 published?
The CVE record for CVE-2026-84975 was published on September 18, 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 20, 2026; the record at its source may have been updated since.
Is CVE-2026-84975 actively exploited?
CVE-2026-84975 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (14th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-84975?
CVE-2026-84975 has a CVSS base score of 7.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-84975?
A fix for CVE-2026-84975 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-84975

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