CVE-2023-27557Network attack vector

Sensitive-data decryption via legacy TLS protocols

Published Apr 28, 2023 · Updated Jan 30, 2025

Weak cryptography in affected IBM Safer Payments releases allows remote attackers to decrypt sensitive information over the network. The server enables TLS 1.0 and TLS 1.1 by default, allowing connections to negotiate legacy protocols whose cryptography provides weaker protection. Network access to a TLS service is required; the reported consequence is disclosure of protected information, without integrity or availability impact.

CVSS severity5.9
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Weak cryptography in affected IBM Safer Payments releases allows remote attackers to decrypt sensitive information over the network. The server enables TLS 1.0 and TLS 1.1 by default, allowing connections to negotiate legacy protocols whose cryptography provides weaker protection. Network access to a TLS service is required; the reported consequence is disclosure of protected information, without integrity or availability impact.

The record

CVE
CVE-2023-27557
Published
Apr 28, 2023
Updated
Jan 30, 2025
Vendor
IBM
Product
IBM Safer Payments
Classifications
CWE-327
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.1.0.00 <=6.1.1.02
  2. Affected versionversion=6.2.0.00 <=6.2.2.02
  3. Affected versionversion=6.3.0.00 <=6.3.1.02
  4. Affected versionversion=6.4.0.00 <=6.4.2.01
  5. Affected versionversion=6.5.0.00

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · IBM Safer Paymentsversion=6.1.0.00 <=6.1.1.02; version=6.2.0.00 <=6.2.2.02; version=6.3.0.00 <=6.3.1.02; version=6.4.0.00 <=6.4.2.01; version=6.5.0.00

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.9IBM CorporationCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-327Use of a Broken or Risky Cryptographic Algorithm

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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