CVSS base score: 5.9 (Medium) CISA · v3.1
Score assigned by CISA's Vulnrichment program; the vendor's CVE record did not include one. Vulnrichment source record →
Vendor: OpenSSL Product: OpenSSL
A timing based side channel exists in the OpenSSL RSA Decryption implementation which could be sufficient to recover a plaintext across a network in a Bleichenbacher style attack. To achieve a successful decryption an attacker would have to be able to send a very large number of trial messages for decryption. The vulnerability affects all RSA padding modes: PKCS#1 v1.5, RSA-OEAP and RSASVE. For example, in a TLS connection, RSA is commonly used by a client to send an encrypted pre-master secret to the server. An attacker that had observed a genuine connection between a client and a server could use this flaw to send trial messages to the server and record the time taken to process them. After a sufficiently large number of messages the attacker could recover the pre-master secret used for the original connection and thus be able to decrypt the application data sent over that connection.
No mentions found in monitored research blogs or news feeds.
| Date | Advisory | Issuer |
|---|---|---|
| 2026-05-21 | ICSA-26-141-01: Hitachi Energy GMS600 | CISA |
| 2025-06-09 | ICSA-25-160-02: Hitachi Energy Relion 670, 650, SAM600-IO Series (Update A) | CISA |
| 2025-03-06 | ICSA-25-065-01: Hitachi Energy PCU400 | CISA |
| 2025-02-13 | ICSA-25-044-09: Siemens SCALANCE W700 IEEE 802.11ax | CISA |
| 2024-07-23 | ICSA-24-205-02: Hitachi Energy AFS/AFR Series Products | CISA |
| 2024-06-13 | ICSA-24-165-06: Siemens TIM 1531 IRC | CISA |
| 2024-06-13 | ICSA-24-165-11: Siemens SCALANCE XM-400, XR-500 | CISA |
| 2024-06-13 | ICSA-24-165-10: Siemens SIMATIC and SIPLUS | CISA |
| 2024-02-15 | ICSA-24-046-15: Siemens SINEC NMS | CISA |
| 2024-01-04 | ICSA-24-004-02: Mitsubishi Electric Factory Automation Products | CISA |
Each milestone comes from a different source, so gaps between them are gaps in what those sources publish, not evidence that nothing happened. EPSS history for this CVE holds 4 points from 2026-11-05, tracked daily from 2026-11-05; earlier points are weekly, which dates a spike to within a week. Peak probability 23.5% on 2026-11-05.
Check whether a specific version is affected →
What each source publishes about which product versions carry this vulnerability, kept as written rather than merged. Absence here means no source has published applicability data, not that nothing is affected.
Coverage across public collections only: Nuclei and OpenVAS NVT (scan);
Snort and Suricata ET Open (network); Sigma and YARA (host/SIEM);
Metasploit, Exploit-DB, public GitHub repositories and NVD exploit references (exploit). Absence
here means nothing public was found, not that detection is impossible.
GitHub PoC repositories are collected automatically by
PoC-in-GitHub (CC0) and filtered to repositories that are
still online, contain code, and are starred or at least two weeks old. They are
still not vetted: some are fakes and some are malware. Treat
them as evidence that code was published, not as code to run.
NVD exploit references are links NVD's analysts tag as exploits; they confirm
an exploit was referenced but carry no date. This product uses data from the
NVD but is not endorsed or certified by the NVD.
OpenVAS coverage derives from the Greenbone Community Feed, made available
under the Open Database License (ODbL) v1.0;
its individual Vulnerability Tests are licensed
GNU GPL v2.
| First seen | Tool | Evidence | Earliest reference |
|---|---|---|---|
| 2023-04-24 | GitHub PoC | Unvetted — public repository | Trinadh465/Openssl-1.1.1g_CVE-2022-4304 |
Metasploit is dated by the first commit of the module file, Exploit-DB by its publication date, and GitHub repositories by their creation date. GitHub PoC repositories are filtered (still online, contain code, starred or at least two weeks old) but not vetted: some are fakes and some are malware, so they show that code was published, not that it works or is safe to run. Evidence tiers are explained on the About page.
Where the distribution has shipped a fix, and in which version. Green means the release has resolved it, amber that it is still open. Data from the Debian Security Tracker, used under Debian's MIT / GPLv2+ terms. Debian is upstream of several other distributions, so a fix here often precedes theirs.
| If the asset is | Remediate within | Table 1 row |
|---|---|---|
| Publicly exposed | 60 days | 8 of 16 |
| Not publicly exposed | Fix on system upgrade | 16 of 16 |
BOD 26-04 replaced the single KEV deadline of BOD 22-01 with four inputs: whether the asset is publicly exposed, KEV status, whether exploitation is automatable, and technical impact. Exposure belongs to each agency's asset, not to the CVE, so both outcomes are shown. Automatable and technical impact come from the CISA assessment above. Days are calendar days; for KEV entries the clock starts on the date it was added, and otherwise when the agency identifies the vulnerability on an asset. Agencies make the final exposure call asset by asset, and may set shorter timelines.
CVE.org record → NVD entry → FortiGuard Labs → Rapid7 AttackerKB →