CVE-2025-61984General

LOWCVSS 3.6 · LOW

Exploit discussion active in current signal (1 latest mentions)

Immediate actions

  • Patch affected systems immediately
  • Hunt for exploitation attempts and persistence artifacts
  • Increase monitoring for publicly documented tradecraft

Recommended action window: High priority (within 72h)

NVD description

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.)

2.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-159

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

STABLE

Threat summary

  • Public PoC is present in monitored signal
  • Patch or workaround signal is available
  • 6 mentions across 4 observed days
  • Momentum state: stable

What's happening

  • PoC mentioned or linked in 1 signal
  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 2 signals
  • General: 4 classified signals
  • Disclosure: 1 classified signal
  • Peaked 3d ago at 2 mentions (2026-01-31); latest day: 1
  • 6 total mentions across 4 days

Deep dive

Activity timeline6 mentions / 4d
01122Mentions · 2026-01-31: 2Mentions · 2026-02-01: 2Mentions · 2026-02-12: 1Mentions · 2026-05-19: 1PoC Mentioned / Linked · 2026-02-01: 1Patch / Workaround · 2026-05-19: 1Technical Details · 2026-01-31: 1Technical Details · 2026-05-19: 101-3102-0102-1205-19
Signal classification3 categories
General
466.7%
PoC
116.7%
Disclosure
116.7%
Referenced assets2 URLs
Classification over time
DateTotalLabels
2026-01-312
General2
2026-02-012
General1PoC1
2026-02-121
General1
2026-05-191
Disclosure1
Full discourse6 posts
  • reverseame@reverseame
    General

    Bash a newline: Exploiting SSH via ProxyCommand, again (CVE-2025-61984) #SSH #RCE #ProxyCommand #ShellExploit #GitSubmodules https://dgl.cx/2025/10/bash-a-newline-ssh-proxycommand-cve-2025-61984

    Post summary

    The tweet references CVE-2025-61984, noting it permits RCE through SSH ProxyCommand, but it provides no evidence of an existing PoC, exploit code, patch, or active exploitation.

    110032172.6K
    21.6K followersView on X
  • Clandestine@akaclandestine
    PoC

    Bash a newline: Exploiting SSH via ProxyCommand, again (CVE-2025-61984) https://dgl.cx/2025/10/bash-a-newline-ssh-proxycommand-cve-2025-61984

    Post summary

    The post references a Bash newline vulnerability (CVE‑2025‑61984) that can be exploited via SSH ProxyCommand, linking to a write‑up that likely contains a Proof of Concept, but it does not mention active exploitation, patches, or detailed technical info.

    0101491.7K
    55.0K followersView on X
  • Pete Massiello@petem59
    Disclosure

    5733-SC1 7.2 through 7.6 - OpenSSH vulnerability. #IBMi CVEID:  CVE-2025-61984 DESCRIPTION:  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.) CWE:  CWE-159: Improper Handling of Invalid Use of Special Elements CVSS Source:  cve@mitre.org CVSS Base score:  3.6 CVSS Vector:  (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N) CVEID:  CVE-2025-61985 DESCRIPTION:  ssh in OpenSSH before 10.1 allows the '\0' character in an ssh:// URI, potentially leading to code execution when a ProxyCommand is used. CWE:  CWE-158: Improper Neutralization of Null Byte or NUL Character CVSS Source:  cve@mitre.org CVSS Base score:  3.6 CVSS Vector:  (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N) Remediation/Fixes IBM i ReleasePTF Number(s) 7.6 SJ09226 7.5 SJ09227 7.4 SJ09257 7.3 SJ09257 7.2 SJ09257

    Post summary

    The post announces vulnerabilities CVE-2025-61984 and CVE-2025-61985 in OpenSSH, provides detailed technical descriptions and CVSS data, and lists specific IBM i PTF repairs.

    000311.1K
    1.4K followersView on X
  • John McGinnis@JohnMcGinn90325
    General

    @CyberRacheal For those that say port 22, you might want to review CVE-2025-32433, CVE-2024-6387, CVE-2025-61984. Need to review version and patch levels and you still might be vulnerable. Remote access should be frontended with a private VPN. Yes I am paranoid.

    Post summary

    The tweet mentions several CVEs and advises users to check patch levels, but it offers no technical details, exploit evidence, or patch information.

    1002054
    319 followersView on X
  • VulnTracker@vuln_tracker
    General

    @reverseame You now can see the full details about CVE-2025-61984 on http://Vulntracker.io

    Post summary

    The tweet references CVE-2025-61984 and points to an external site for details, but provides no further information on exploitation, patching, or technical specifics.

    01020120
    335 followersView on X
  • Constantin Milos ♏@Tinolle infosec.exchange@Tinolle1955
    General

    Bash a newline: Exploiting SSH via ProxyCommand, again (CVE-2025-61984) https://dgl.cx/2025/10/bash-a-newline-ssh-proxycommand-cve-2025-61984

    Post summary

    The content references a blog post about exploiting CVE‑2025‑61984 via SSH ProxyCommand but does not provide detailed technical info, PoC, or evidence of active exploitation.

    0000093
    4.6K followersView on X

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