ssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly untrusted sources, potentially leading to code execution when a ProxyCommand is used. The untrusted sources are the command line and %-sequence expansion of a configuration file. (A configuration file that provides a complete literal username is not categorized as an untrusted source.)
CVE-2025-61984
Score 3.6 from GitHub Security Advisory (severity: LOW) published 2025-10-06. a secondary CVSS source baseline 3.6; sources differ by 0.0.
- Lower severity and no public exploit yet
A fix is available — apply it.
- CVSS v3
- 3.6
- EG Score
- 3.6(medium)
- EG Risk
- 32(Track*)EG Risk 32/100SSVC: Track*
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity36% × 45%Exploitation40% × 40%Automatability0% × 15%Action: Watch closely — could escalate to Attend. - EPSS PROB
- 0%
- EPSS %ILE
- 20%
- KEV
- Not listed
Published
October 6, 2025
Last Modified
July 14, 2026
References (9)
- cve@mitrehttps://marc.info/?l=openssh-unix-dev&m=175974522032149&w=2
- cve@mitrehttps://www.openssh.com/releasenotes.html#10.1p1
- cve@mitrehttps://www.openwall.com/lists/oss-security/2025/10/06/1
- af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2025/10/07/1
- af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2025/10/12/1
- af854a3a-2127-422b-91ae-364da2661108https://www.vicarius.io/vsociety/posts/cve-2025-61984-detection-script-remote-code-execution-vulnerability-affecting-openssh
- af854a3a-2127-422b-91ae-364da2661108https://www.vicarius.io/vsociety/posts/cve-2025-61984-mitigation-script-remote-code-execution-vulnerability-affecting-openssh
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5ehttps://cert-portal.siemens.com/productcert/html/ssa-019113.html
- 134c704f-9b21-4f2e-91b3-4a467353bcc0https://dgl.cx/2025/10/bash-a-newline-ssh-proxycommand-cve-2025-61984
Vendor Advisories for CVE-2025-61984(14)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2026:5475Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Hardened Images RPM Release
- RHSA-2026:1858Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Ceph Storage
- RHSA-2026:1815Red Hat Product SecurityMedium
Red Hat Security Advisory: openssh security update
- RHSA-2026:1790Red Hat Product SecurityMedium
Red Hat Security Advisory: openssh security update
- RHSA-2026:1678Red Hat Product SecurityMedium
Red Hat Security Advisory: openssh security update
- RHSA-2026:1652Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Ceph Storage
- RHSA-2026:0976Red Hat Product SecurityMedium
Red Hat Security Advisory: openssh security update
- RHSA-2026:0693Red Hat Product SecurityMedium
Red Hat Security Advisory: openssh security update
- +6 more
Patch Availability(15)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | ssh-askpass-gnome (1:10.0p1-5ubuntu5.1) @ questing | 2026-05-21 | ubuntu |
| ubuntu | ssh-askpass-gnome (1:8.2p1-4ubuntu0.13+esm1) @ focal | 2026-05-21 | ubuntu |
| redhat | openssh-main-10.2p1-9.hum1 | 2026-03-23 | redhat |
| redhat | rhceph/rhceph-7-rhel9:1769508455 | 2026-02-03 | redhat |
| redhat | openssh-0:8.7p1-13.el9_0.1 | 2026-02-03 | redhat |
| redhat | openssh-0:8.7p1-30.el9_2.9 | 2026-02-03 | redhat |
| redhat | rhceph/rhceph-8-rhel9:1769512383 | 2026-02-02 | redhat |
| redhat | openssh-0:9.9p1-7.el10_0.1 | 2026-02-02 | redhat |
| redhat | openssh-0:8.7p1-38.el9_4.6 | 2026-01-22 | redhat |
| redhat | openssh-0:8.7p1-45.el9_6.1 | 2026-01-15 | redhat |
| redhat | rhui5/rhua-rhel9:1768377012 | 2026-01-15 | redhat |
| redhat | discovery/discovery-server-rhel9:1767888970 | 2026-01-08 | redhat |
| redhat | openssh-0:8.0p1-27.el8_10 | 2025-12-17 | redhat |
| redhat | openssh-0:8.7p1-47.el9_7 | 2025-12-17 | redhat |
| redhat | openssh-0:9.9p1-12.el10_1 | 2025-12-17 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(7 across 7 ecosystems)
Alpine:v3.22(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| openssh | — | 10.0_p1-r10 | — |
Alpine:v3.23(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| openssh | — | 10.1_p1-r0 | — |
Alpine:v3.24(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| openssh | — | 10.1_p1-r0 | — |
Debian:11(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| openssh | 1:8.4p1-5 ... 1:8.4p1-5+deb11u6 (7 versions) | 1:8.4p1-5+deb11u7 | — |
Debian:12(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| openssh | 1:9.2p1-2 ... 1:9.2p1-2+deb12u7 (8 versions) | 1:9.2p1-2+deb12u8 | — |
Debian:13(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| openssh | 1:10.0p1-7 | 1:10.0p1-7+deb13u1 | — |
Debian:14(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| openssh | 1:10.0p1-7, 1:10.0p1-8 | 1:10.1p1-1 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Additional Vendor Advisories
(3)
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
- Microsoft MSRCCVE-2025-619842025-10-08
ssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly untrusted sources, potentially leading to code execution when a ProxyCommand is used. The untrusted sources are the command line and %-sequence expansion of a configuration file. (A configuration file that provides a complete literal username is not categorized as an untrusted source.)
- UbuntuUSN-8090-1LOW
OpenSSH vulnerabilities
- UbuntuUSN-8090-2LOW
OpenSSH vulnerabilities
Data Freshness Timeline
(refreshed 7× in last 7d / 32× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.
Showing the most recent 100 of 153 total refreshes for this CVE.
- 2026-08-30 19:16 UTCEPSS rescore
- 2026-08-30 01:21 UTCEPSS rescore
- 2026-08-28 21:40 UTCEPSS rescore
- 2026-08-27 14:24 UTCEPSS rescore
- 2026-08-26 14:45 UTCEPSS rescore
- 2026-08-25 13:48 UTCEPSS rescore
- 2026-08-24 14:16 UTCEPSS rescore
- 2026-08-23 00:18 UTCEPSS rescore
- 2026-08-21 23:48 UTCEPSS rescore
- 2026-08-20 22:55 UTCEPSS rescore
- 2026-08-19 17:03 UTCEPSS rescore
- 2026-08-18 13:47 UTCEPSS rescore
- 2026-08-17 13:46 UTCEPSS rescore
- 2026-08-16 14:55 UTCEPSS rescore
- 2026-08-16 02:13 UTCEPSS rescore
- 2026-08-15 01:30 UTCEPSS rescore
- 2026-08-15 01:29 UTCEPSS rescore
- 2026-08-13 21:59 UTCEPSS rescore
- 2026-08-12 13:50 UTCEPSS rescore
- 2026-08-11 13:42 UTCEPSS rescore
- 2026-08-10 23:59 UTCEPSS rescore
- 2026-08-09 13:46 UTCEPSS rescore
- 2026-08-09 13:46 UTCEPSS rescore
- 2026-08-08 16:36 UTCEPSS rescore
- 2026-08-07 16:26 UTCEPSS rescore
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- 2026-08-06 13:46 UTCEPSS rescore
- 2026-08-05 19:17 UTCEPSS rescore
- 2026-08-05 19:17 UTCEPSS rescore
- 2026-08-04 15:09 UTCEPSS rescore
- 2026-08-04 10:37 UTCEPSS rescore
- 2026-08-03 10:35 UTCEPSS rescore
- 2026-08-02 02:26 UTCEPSS rescore
- 2026-08-01 04:15 UTCEPSS rescore
- 2026-07-30 16:27 UTCEPSS rescore
- 2026-07-30 01:30 UTCEPSS rescore
- 2026-07-28 15:35 UTCEPSS rescore
- 2026-07-27 14:12 UTCEPSS rescore
- 2026-07-26 14:54 UTCEPSS rescore
- 2026-07-26 14:54 UTCEPSS rescore
- 2026-07-25 14:17 UTCEPSS rescore
- 2026-07-24 14:17 UTCEPSS rescore
- 2026-07-24 14:17 UTCEPSS rescore
- 2026-07-23 14:18 UTCEPSS rescore
- 2026-07-23 14:18 UTCEPSS rescore
- 2026-07-23 03:00 UTCEG score recompute
- 2026-07-22 14:08 UTCEPSS rescore
- 2026-07-20 17:08 UTCEPSS rescore
- 2026-07-19 14:30 UTCEPSS rescore
- 2026-07-19 14:30 UTCEPSS rescore
- 2026-07-19 02:28 UTCEPSS rescore
- 2026-07-18 10:04 UTCEPSS rescore
- 2026-07-18 10:04 UTCEPSS rescore
- 2026-07-16 17:02 UTCEPSS rescore
- 2026-07-15 16:57 UTCEPSS rescore
- 2026-07-15 16:57 UTCEPSS rescore
- 2026-07-15 01:59 UTCEPSS rescore
- 2026-07-15 01:59 UTCEPSS rescore
- 2026-07-13 22:29 UTCEPSS rescore
- 2026-07-13 06:12 UTCEPSS rescore
- 2026-07-12 05:46 UTCEPSS rescore
- 2026-07-11 08:27 UTCEPSS rescore
- 2026-07-09 19:09 UTCEPSS rescore
- 2026-07-08 15:15 UTCEPSS rescore
- 2026-07-07 13:46 UTCEPSS rescore
- 2026-07-06 16:27 UTCEPSS rescore
- 2026-07-06 16:27 UTCEPSS rescore
- 2026-07-06 02:23 UTCEPSS rescore
- 2026-07-06 02:23 UTCEPSS rescore
- 2026-07-05 02:30 UTCEPSS rescore
- 2026-07-05 02:30 UTCEPSS rescore
- 2026-07-04 06:31 UTCEPSS rescore
- 2026-07-04 06:30 UTCEPSS rescore
- 2026-07-01 15:06 UTCEPSS rescore
- 2026-07-01 15:06 UTCEPSS rescore
- 2026-06-30 23:22 UTCEPSS rescore
- 2026-06-29 14:06 UTCEPSS rescore
- 2026-06-29 14:06 UTCEPSS rescore
- 2026-06-28 14:07 UTCEPSS rescore
- 2026-06-28 14:07 UTCEPSS rescore
- 2026-06-28 04:56 UTCEPSS rescore
- 2026-06-28 04:55 UTCEPSS rescore
- 2026-06-27 03:08 UTCEPSS rescore
- 2026-06-25 13:49 UTCEPSS rescore
- 2026-06-24 14:04 UTCEPSS rescore
- 2026-06-24 14:04 UTCEPSS rescore
- 2026-06-23 21:32 UTCEPSS rescore
- 2026-06-23 21:32 UTCEPSS rescore
- 2026-06-22 14:25 UTCEPSS rescore
- 2026-06-21 14:56 UTCEPSS rescore
- 2026-06-21 14:56 UTCEPSS rescore
- 2026-06-21 01:59 UTCEPSS rescore
- 2026-06-21 01:59 UTCEPSS rescore
- 2026-06-19 19:25 UTCEPSS rescore
- 2026-06-19 19:25 UTCEPSS rescore
- 2026-06-17 17:52 UTCEPSS rescore
- 2026-06-16 17:52 UTCEPSS rescore
- 2026-06-15 17:48 UTCEPSS rescore
- 2026-06-15 17:48 UTCEPSS rescore
- 2026-06-14 23:18 UTCEPSS rescore
- 2026-06-13 23:00 UTCEPSS rescore
Publicly available exploits
(1 reference)Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
- GitHub PoCdgl/cve-2025-61984-pocFirst seen Oct 7, 2025
PoC for OpenSSH ProxyCommand CVE-2025-61984
Open source ↗
Frequently asked(5)
What is CVE-2025-61984?
When was CVE-2025-61984 disclosed?
Is CVE-2025-61984 actively exploited?
What is the CVSS score of CVE-2025-61984?
How do I remediate CVE-2025-61984?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-61984
Is Your Infrastructure Affected by CVE-2025-61984?
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