CVE-2023-27350

has not confirmed the vulnerability targeted by Storm-1175 in this campaign, the threat actor is likely exploiting the CVE-2026-18577 authentication bypass vulnerability in N-able, which was disclosed on August 2, 2026 and added to the Cybersecurity and Infrastructure Security Agency (CISA) Known Exploited Vulnerabilities (KEV) catalog on August 3, 20

China-based actor Storm-1175 runs fast ransomware attacks, exploiting new flaws to breach systems and quickly deploy Medusa ransomware. China-based actor Storm-1175 carries out fast, financially driven ransomware attacks by exploiting newly disclosed vulnerabilities before organizations patch them. The group targets exposed systems and quickly moves from initial access to data theft and Medusa ransomware deployment, […]

Introduction Memory safety issues have plagued the software industry for decades. The Cybersecurity & Infrastructure Security Agency (CISA) has been leading a charge for secure-by-design and encouraging developers and vendors to utilize memory safe languages like Rust to eradicate this vulnerability class. Google Chromium, the engine used by the majority of browsers around the world, […]

A new vulnerability in the PaperCut MF/NG print management software can be exploited for unauthenticated, remote code execution.

Horizon3.ai researchers have published some details (but no PoC for now, thankfully!) about CVE-2023-39143, two vulnerabilities in PaperCut application servers that could be exploited by unauthenticated attackers to execute code remotely. But, they noted, unlike the PaperCut vulnerability (CVE-2023-27350) recently leveraged by Clop and LockBit ransomware affiliates, CVE-2023-39143 is not a “one-shot” RCE bug. “CVE-2023-39143 is more complex to exploit, involving multiple issues that must be chained together to compromise a server,” they pointed out. … More →

Researchers discovered a vulnerability in PaperCut NG/MF print management software that can lead to remote code execution. Cybersecurity researchers at Horizon3 discovered a high-severity vulnerability, tracked as CVE-2023-39143 (CVSS score: 8.4), in PaperCut print management software for Windows. An attacker can exploit the vulnerability to gain remote code execution under specific conditions. The vulnerability CVE-2023-39143 is a path traversal […]

Summary CVE-2023-39143 is a critical vulnerability we disclosed to PaperCut that affects the widely used PaperCut NG/MF print management software. It affects PaperCut NG/MF running on Windows, prior to version 22.1.3. If you are a user of PaperCut on Windows, and have it exposed to the Internet, we recommend you check out the July 2023 […]

A previously unseen command-and-control (C2) framework called PhonyC2 has been attributed to the Iranian state-sponsored group MuddyWater. The custom-made, and continuously developing PhonyC2 was used by the threat actor to exploit the log4j vulnerability in the Israeli SysAid software, the attack against Technion, an Israeli institution, and the ongoing attack against the PaperCut print management […]

The recently identified Buhti operation targets organizations worldwide with rebranded LockBit and Babuk ransomware variants. Researchers from Symantec discovered a new ransomware operation called Buhti (aka Blacktail) that is using LockBit and Babuk variants to target Linux and Windows systems worldwide. The ransomware operation hasn’t its own ransomware payload, however, it uses a custom information […]

The recently identified Buhti operation uses LockBit and Babuk ransomware variants to target Linux and Windows systems.

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U.S. CISA and FBI warned of attacks conducted by the Bl00dy Ransomware Gang against the education sector in the country. The FBI and CISA issued a joint advisory warning that the Bl00dy Ransomware group is actively targeting the education sector by exploiting the PaperCut remote-code execution vulnerability CVE-2023-27350. The Bl00dy ransomware has been active since May 2022, […]

CISA and FBI have observed a ransomware gang exploiting a recent PaperCut vulnerability in attacks targeting the education facilities subsector.

Microsoft warns that two Iranian state-sponsored groups have adopted exploits targeting a recently patched PaperCut vulnerability.

Microsoft warns of Iran-linked APT groups that are targeting vulnerable PaperCut MF/NG print management servers. Microsoft warns that Iran-linked APT groups have been observed exploiting the CVE-2023-27350 flaw in attacks against PaperCut MF/NG print management servers. The CVE-2023-27350 flaw is a PaperCut MF/NG Improper Access Control Vulnerability. PaperCut MF/NG contains an improper access control vulnerability within the […]

VulnCheck researchers devised a new exploit for a recently disclosed critical flaw in PaperCut servers that bypasses all current detections. Cybersecurity researchers from VulnCheck have developed a new exploit for the recently disclosed critical flaw in PaperCut servers, tracked as CVE-2023-27350 (CVSS score: 9.8), that bypasses all current detections. The CVE-2023-27350 flaw is a PaperCut MF/NG Improper Access […]

For the latest discoveries in cyber research for the week of 1st May, please download our Threat_Intelligence Bulletin TOP ATTACKS AND BREACHES A threat actor was able to generate some mail keys of American Telecom giant AT&T, and used it to take control of AT&T customers’ email addresses. Victims report that cryptocurrency accounts connected to […]

A new round of the weekly SecurityAffairs newsletter arrived! Every week the best security articles from Security Affairs are free for you in your email box. Enjoy a new round of the weekly SecurityAffairs newsletter, including the international press. ViperSoftX uses more sophisticated encryption and anti-analysis techniques Atomic macOS Stealer is advertised on Telegram for […]

Microsoft says Cl0p ransomware operator has been exploiting a recently patched PaperCut vulnerability since April 13.

Clop and LockBit ransomware affiliates are behind the recent attacks exploiting vulnerabilities in PaperCut application servers, according to Microsoft and Trend Micro researchers. The detected campaings “Microsoft is attributing the recently reported attacks exploiting the CVE-2023-27350 and CVE-2023-27351 vulnerabilities in print management software PaperCut to deliver Clop ransomware to the threat actor tracked as Lace Tempest (overlaps with FIN11 and TA505),” Microsoft shared. “Lace Tempest (DEV-0950) is a Clop ransomware affiliate that has been observed … More →

An unauthenticated RCE flaw (CVE-2023-27350) in widely-used PaperCut MF and NG print management software is being exploited by attackers to take over vulnerable application servers, and now there’s a public PoC exploit. About the vulnerability According to PaperCut, the attacks seem to have started on April 14, 2023 – a month and a week after the software maker released new PaperCut MF and NG versions that fixed CVE-2023-27350 and CVE-2023–27351, an unauthenticated information disclosure flaw … More →

Threat actors are exploiting PaperCut MF/NG print management software flaws in attacks in the wild, while researchers released PoC exploit code. Hackers are actively exploiting PaperCut MF/NG print management software flaws (tracked as CVE-2023-27350 and CVE-2023-27351) in attacks in the wild. The threat actors were observed installing the Atera remote management software to take over vulnerable servers. On […]

Researchers warn that majority of Windows and macOS PaperCut installations still vulnerable to critical vulnerability already exploited in malware attacks.

Print management software provider PaperCut confirmed ongoing active exploitation of CVE-2023-27350 vulnerability. On April 19th, Print management software provider PaperCut confirmed that it is aware of the active exploitation of the CVE-2023-27350 vulnerability. The company received two vulnerability reports from the cybersecurity firm Trend Micro for high/critical severity security issues in PaperCut MF/NG. Trend Micro announced they will […]

Overview On 8 March 2023, PaperCut released new versions for their enterprise print management software, which included patches for two vulnerabilities: CVE-2023-27350 and CVE-2023-27351. The PaperCut security advisory details CVE-2023-27350 as a vulnerability that may allow an attacker to achieve remote code execution to compromise the PaperCut application server. PaperCut also details in this advisory […]

US Cybersecurity and Infrastructure Security Agency (CISA) added MinIO, PaperCut, and Chrome vulnerabilities to its Known Exploited Vulnerabilities catalog. U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added the following three new issues to its Known Exploited Vulnerabilities Catalog: According to Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities, FCEB agencies have […]

Print management solutions provider PaperCut warns that exploitation of a recently patched vulnerability has commenced.